UPDATE AUGUST 26: After last night’s episode, there are a lot of questions about Jesse’s desert revelation and how it all fits together, so I updated this post to include that toward the end, to keep it chronological. You can skip to that part here.
I’ve noticed that a lot of people come across my blog from googling something like, “How did Walter White poison Brock?” or “What happened to the ricin cigarette?” or “what happened berries Walter Brock” or something similar. On the Breaking Bad message boards, questions about these topics still rage. While watching the latest episode on Sunday night, some friends were asking the the same questions. This storyline definitely has to be one of the most complex–maybe even convoluted–plotlines on the show. Some of it is more left to assumption than explicitly shown. So I thought I’d try to elucidate with my understanding of what happened, start to finish.
In episode 407 “Problem Dog,” Walt makes some ricin in the superlab. He gives it to Jesse, who puts it in a “lucky cigarette” that he keeps upside down in his cigarette pack. The ricin cigarette is born.
In episode 412 “End Times,” Walt is despondent and doesn’t know what to do. Gus has just threatened his wife, son, infant daughter and brother-in-law. Walt knows that Gus could be close to turning Jesse against him and that Jesse’s flagging loyalty is the only thing keeping Gus from killing him. Since Skyler gave a big chunk of Walt’s drug money to the IRS for the Ted thing, Walt doesn’t have the money to get himself and his family out of town through Saul’s disappeaerer “vacuum guy.” He sits out back behind his house and spins a revolver. The first two times, it points at him. The third time though, it points to a potted plant, which (we will later come to see) is a lily of the valley plant. Here is where Walter White gets his idea.
A few things to keep in mind from previous scenes and eps: First, Walt saw Brock and Andrea at Jesse’s apartment. He knows to some extent who they are and that Jesse cares about them. Second, Jesse has been carrying around a vial of ricin inside a cigarette for awhile now to (maybe) use on Gus. Lastly, Gus has used children before. His meth empire used kids like Andrea’s little brother Tomas, and when Jesse gets upset about this, Gus’s people kill Tomas (episode 312 “Half-Measure”). So Gus has hurt kids in Andrea’s family before.
So here’s (my assumption of) Walter’s plan. He has Saul deliver the lily of the valley berries to Brock in some way. This is never shown exactly but probably Walt did something with the berries like made them up into some candy (chemistry skills) or something and had Saul deliver it to the boy. This wouldn’t have been too weird because earlier in Season 4, before Jesse and Andrea got back together, Saul used to deliver money from Jesse to Andrea and had seen and talked to Brock in the past.
UPDATE: At the 2013 Comic-Con Vince Gilligan explained exactly how he and the writers imagined Walt got the poison to Brock, and it wasn’t, as I had thought, through Saul. Instead they pictured Walt as the “Evil Juice Box Man” going into Brock’s school and giving him a juice box that had juice from the poison berries. And if you’ll look closely at episode 413 “Face Off” (thanks to Greg below for pointing this out), when Walt busts into Saul’s office, Francesca is shredding school schedules. It’s a big spreadsheet of classes and times but there are notes on the side that seem to be one student’s personal schedule, most likely Brock’s. So, kudos to the writers on including that little detail, and again to Greg for noticing that what’s was being shredded. End of update.
Then, Walt has Saul, through his bodyguard Huell, remove Jesse’s ricin cigarette by switching out the packs. He removes Jesse’s pack with the cigarette containing the ricin vial and puts in a pack without it. This happens when Huell gives Jesse a pat down after Saul calls him to the office. Recall that Jesse got many, many urgent messages from Saul demanding that he come in to the office–this was done to get him there so Huell could do the cigarette pack switcharoo–then Saul kinda blows off Huell, as if he knows nothing about it (Saul’s good like that) and tells Jesse that these are “the end times, kid.” Walt has to make sure Jesse’s ricin cigarette is removed so he can convince Jesse that Gus or Tyrus stole the ricin cig to poison Brock.
So then, Jesse gets the call that Brock is in the hospital. He hears Brock has flu-like symptoms that aren’t getting better, which is exactly what Walt told Jesse back in the Tuco days is what would happen to someone with ricin poisoning. Jesse figures out EXACTLY what happened–that Walt poisoned Brock (likely through Saul) and then had Huell remove the ricin cigarette from him. This is exactly what he accuses Walt of when he threatens to kill Walt. In fact, if you’re still having questions about this whole deal, watch this scene where Jesse almost kills Walt because he gets it exactly right (except that Walt didn’t actually use ricin).
But then Walt turns it around and convinces Jesse that Gus has done it as an attempt to frame Walt and get Jesse to finally give his consent to kill Walt or to kill Walt himself. Jesse’s refusal to give the okay to kill Walt was the thorn in Gus’s side. Gus has used children before, he argues, and he swears that he himself would never do such a thing to a child. He convinces Jesse that Gus knew about the ricin cigarette because Gus had cameras on them all the time. Jesse, who on some level loves Walt and thinks of him as a father figure, decides to believe Walt rather than shoot him, and helps Walt to kill Gus.
Afterward, Jesse finds out that Brock wasn’t poisoned with ricin after all, but lily of the valley. He thinks it’s all a coincidence and Walt assures him they still did the right thing in killing Gus. All seems well as Walt relaxes out back behind his house, in a much different state of mind then he was in before. In the last frames of Season 4, the camera focuses in on the same plant that Walt’s revolver pointed at in the earlier scene, and its tag, which says “Lily of the Valley.” This is supposed to let us as the audience know that yes, Walt poisoned Brock.
So why did Walt go to the trouble of doing it with lily of the valley instead of just using ricin? Well, as evil as Walt has become, he doesn’t actually want to murder a kid. The implication is that if he had actually used ricin, it would have killed Brock but with lily of the valley, it was “touch and go” but Brock pulled through. Also, I think that Walt, true to character, isn’t even thinking far enough ahead to think of what a weird coincidence it could look like. All he’s thinking about is survival, about getting Jesse to think Gus poisoned Brock with ricin so Jesse will get back on his side. That’s it.
In season 5, some loose ends still need to be cleaned up. The first is that Walt throws out his lily of the valley plant, destroying the evidence. Then, in his meeting with Saul, Saul hands the ricin cigarette that Huell lifted from Jesse back to Walt. Saul also says that he had no idea that Brock would end up in the hospital. It’s never explicitly spelled out but this conversation is what reveals that it probably was somehow through Saul that Brock got the poison, and that Saul didn’t really know what he was actually doing. That’s what leads me to believe Walt made the berries into some type of treat for Saul to deliver. Walt is a chemist who made poison out of beans, after all.
Then in episode 502 “Madrigal,” we have more loose ends to tie up. One is that Jesse still doesn’t know what happened to his ricin cigarette. He doesn’t have it, he doesn’t know Walt has it and he no longer believes Gus had it, so in his mind it’s MIA. Walt tries to convince Jesse that he must’ve lost it in the superlab before they torched it but Jesse doesn’t think so. Jesse’s making himself crazy worrying that some innocent person will come across it wherever he lost it and get sick and die because of it. Walt says he’ll come over and help Jesse toss the house and find it. So Walt makes up a dummy ricin cigarette, using salt instead of ricin. He hides the real vial of ricin behind an electrical socket in his bedroom. He then plants the fake cig in Jesse’s Roomba as they are tearing the place apart. We don’t see him do this, but when he offers to help Jesse find it while making a fake one, we assume he’s going to plant it somewhere.
Then Walt pretends not to know what a Roomba is (“What the hell is that thing?”) and convinces Jesse to look inside it. Jesse does and lo and behold there is his “ricin” cigarette. Jesse now believes he made a huge, huge mistake, originally thinking Walt was behind it. He almost killed Walt, and now thinks that Walt, or should I say “Mr. White” was completely innocent. Jesse feels awful and can’t figure out what’s wrong with himself that he would make such a huge “mistake.”
It is genius on Walt’s part. He has gotten Jesse back to his side. He has Jesse doubting his own instincts about what’s going on, feeling like he is instead stupid. Then Walt comes in as the comforting father figure and talks to him about moving forward, so he gets Jesse on board with cooking meth again.
And then in 503 “Hazard Pay,” Walt completes this long con of Jesse by manipulating him into ending things with Andrea, and hence Brock. And then showing absolutely zero interest or concern. Walt has become one sick, twisted dude.
This next section addresses how this plotline about the Brock poisoning and the ricin cigarette plays into episode 511 “Confessions.” DO NOT READ ANY FURTHER if you haven’t yet seen the episode as this will be a big spoiler. You’ve been warned.
In episode 511 “Confessions” Jesse goes to Saul’s office to hire the same “disappearer” that Walt once planned to use. Jesse starts smoking pot in Saul’s office (not the first time, that was nicely set up two episodes back). Saul freaks out and says the disappearer won’t take him if he’s high. So Huell does what he does–he pickpockets Jesse’s pot. If you watch closely, you can see Huell doing this.
Then Jesse, waiting for the disappearer, looks for the pot in his pocket. It’s not there. He starts freaking out, finds the cigarette pack. He realizes that Huell lifted his pot and this triggers Jesse to realize that Huell had switched the packs before, that he’d been right all along (remember, this was his original suspicion). So he goes and beats and threatens at gunpoint the truth out of Saul.
The confusion for a lot of people is that Jesse yells about ricin when he screams at Saul but Brock was poisoned with Lily of the Valley. He screams about the ricin cig because that’s Saul’s part in the plan. Saul and Huell lifted his ricin cigarette (so that Walt could convince Jesse that Gus via Tyrus had stolen it at the lab). He realizes then that he must’ve been played by Walt, that Walt must’ve been the one to poison Brock with Lily of the Valley.
Jesse has been getting smarter for seasons now. And he’s been suspicious of Walt ever since late in the first half of Season Five, and especially since Walt had the guys in prison killed, which told him all he needed to know about what happened to Mike. He’s been terrified of Walt. And there was a lot of talk about Walt playing and working Jesse leading up to this moment in the episode. So, I think Jesse’s in a different place in that he’s readier to see this truth about Walt. It must be under the surface, a seed of suspicion.
In that moment in the desert, waiting for his new life in Alaska, when he finds the cigarette pack in his pocket, I think the whole convoluted plot becomes crystal clear to Jesse in all its detail.
I decided to add on some more because I noticed that a lot of the people who left comments were having trouble believing the leap Jesse made from seeing the cigarette pack to putting the whole plot together. This was a little surprising to me because as soon as I saw Jesse looking at the cigarettes (and I believe it’s a similar camera angle as when he looked at his cigarettes in 412 “End Times” when he realized the ricin one was gone), I started freaking out and silently screaming to myself, Jesse knows! So anyway, I thought I’d try to illuminate in more detail why it was believable to me.
The first thing to remember is that not all that much time has passed since Brock was poisoned in the world of the show. Just a few months. Maybe four or five. For us, it’s been almost two years since the end of Season Four. A lot more time has passed for us as viewers than for the characters on the show. The whole Brock thing wouldn’t be that far buried in Jesse’s mind. He’s also been relatively sober (except for the pot) since, and Jesse’s always smarter when he’s not dipping into the crystal blue persuasion.
The other thing is that Jesse originally put all the pieces together quickly when he came to Walt’s house. Well, he didn’t know Walt had used lily of the valley, but aside from that detail, he’d figured out the whole plot. So, in Jesse’s mind the poisoning of Brock and the lifting of his ricin cig through the pack switchup were already linked in his mind. Maybe that’s why it didn’t seem like much of a leap to me, because Jesse had essentially already figured it out once, and because these things were always linked for him. Walt worked hard to spin a fiction around the whole thing, but it makes sense that once one piece comes tumbling down, like Jesse realizing Huell had switched packs on him back then, the whole castle falls. It’s like Walt built a very big and complicated Jenga tower and all it took was that one piece pulled out to bring it all down. Plus there would’ve been no reason for Walt to have Huell switch cigarette packs on Jesse if he hadn’t poisoned Brock. The two things have always gone together.
And I also think that this is the way realizations work in real life. Consider a more commonplace example, since most of us (I assume) haven’t dealt with having a drug dealer partner mentor father figure poisoning our significant other’s kid in a convoluted plot to win back our loyalty. Consider instead infidelity. You find something that makes you think your spouse/partner/lover/sex friend/whoever is cheating. They give you a plausible (maybe not 100% convincing but plausible) story that explains things away. They appeal to your emotions and swear that they would never do that, they love you and you are their one and only sex friend or whatever. You believe them because you want to believe them, because they seem like the kind of person who would never cheat. And maybe they orchestrate some corroborating evidence to their story (ricin decoy in the roomba equivalent). But all it takes is one tiny little hole in their story–a receipt in a pocket, something out of place in the house, another person who was involved in the cover story (the boss they were supposedly working late for, let’s say) saying something just the slightest bit out of sync with the story, catching a wayward look in a crowded room, a whiff of mysterious cologne or perfume–and suddenly you KNOW. All of it. You were played.
I’m not speaking from experience really on that one, from either side of the scenario, so I’ll go with something less related but it’s the first thing that comes to mind with realizations–Mystery Diagnosis. It’s a show that was (still is?) on Discovery Health about real-life scenarios of patients with illnesses that go undiagnosed or misdiagnosed, sometimes for years. If you think the Brock and ricin storyline is convoluted and muddied, diseases and conditions are worse. Their symptoms overlap so it can be difficult to tease them apart. They are so, so complex. They affect different people in different ways. Especially when you get to the more bizarre ones. This can’t be understated, these were stories of people who serious went sometimes over a decade (or more), to one doctor after another and not getting answers. The doctors who did solve the cases usually did so in a moment. Suddenly it all came into focus, all the different symptoms suddenly slid into place of the one correct diagnosis. And as a viewer watching the show, that’s always happened for me. I couldn’t solve that many (I have no medical training whatsoever, just a biology major including a year of anatomy and physiology, and a lot of time spent watching House back in the day) but I got a handful, maybe ten or so, before it was revealed on the show. And whenever I did, it was because it would suddenly crystallize. Somehow just one word or one symptom would suddenly conjure up some book I’d read a few months or years back, or a patient on House, or something I’d read in A&P or another class, or several of these would come together and I’d start screaming at the TV, “It’s Stills Disease!” or “Acute Intermittent Porphyria, bitch!” or “It’s Addison’s!”
I know this seems like a big tangent, and it kind of is, but the point is that I think the way light bulb realizations work in real life is that stuff bobs around under the surface of our unconscious minds, and sometimes when we’re mentally ready to see something, or when the right little clue piques our interest, that’s all it takes for a complex thing to come into crystal clear focus. I think it’s just very true to human life. Of course not every realization is a light bulb moment, but plenty are.
And Jesse, he’s probably had some questions and curiosities about the Brock poisoning bobbing in his unconscious for awhile now. It was a little too coincidental, you know? That Brock got poisoned and he lost his cigarette and they’re somehow just two odd occurrences that led him to help Walt murder Gus must seem a little weird. I don’t think Jesse totally believed Walt was innocent until he found the decoy in the roomba. And so for awhile he believed Walt’s story. But then, Walt killed Mike’s guys and Jesse figured that meant Walt must’ve also killed Mike. He saw Mr. White in a new, more diabolical light. And lately there’s been all this talk about Walt playing him. And at his house in “Blood Money” he saw what a good liar Walt can be, how convincing he can come off, when Walt lied about Mike being alive. So all it takes is that one thing–his pot–out of place for him to see it all in focus. To essentially go back to his original gut instinct about what happened to Brock (except substituting Lily of the Valley as the actual poison used on Brock) and Saul’s involvement. Remember these two things–Brock being poisoned and Huell switching his packs–were already linked in his mind originally. It really wasn’t that big a leap. All the pieces were there, Jesse just needed a little push to put it all together.
Totally believable and true to life in my eyes.
P.S. I still plan to get to everyone’s comments. Had to stop replying for a bit to get my episode write-up done and now this. And other life things that are not in front of the computer! Some great discussions going on, and I will attend to it all as soon as I can. Rock on all you observant, dedicated and awesome BrBa people!
- Season 5 Part 2 Predictions and Detective Work: Putting All the Clues Together
- Hank’s Dilemma in All its Dimensions
- Walter White’s Moral Demise and the People Jesse Pinkman Loves
- Why Breaking Bad Needs Season 5
- That “Leaked” Breaking Bad Season 5 Premiere Script
- My Official Breaking Bad Season 5 Predictions Post
Great detail, this part of the plot i was at issue with, but now i am completely clear on it all. Thanks, well executed explanation.
” The difficulty of getting Brock to swallow a sufficent dose of poison : bringing it to him, making him eat or drink the right quantity, etc … Not something a Walt or even a Saul would leave to chance. It couldn’t have just happened ; many less complicated developments are described at length. ”
Somewhere else, Gilligan describes Walt as a poisoned juice box fairy. A juice box makes sense since it is a single serving beverage and not resealable after use. The juice box was probably injected with the poison and resealed carefully – maybe from under the flaps. It’s not like it’s one of those tamper-proof bottles of pills.
“Why isn’t this one ?”
It wasn’t essential for the progression of the actual story and/or wasn’t going to reveal much about the characters. The last season had a lot of material to cover and this was not essential.
– “Anybody would go looking for some remains of the plastic ricin holder.”
He did. He didn’t find it until Walt allowed him to “find” it.
” Jesse should have thought Brock could have just bumped into it. ”
No. Brock probably isn’t interested in smoking or cigarettes. Jesse kept the cigarette on him or in his locker at the superlab – Brock wasn’t going to just bump into it.
“Trying to check this possibility would have been a logical course of action, even if it meant admitting, at some point, some responibility to Andrea.”
Unlikely. In the end, Jesse broke up with her because Walt seeded the idea Jesse might have to admit to horrible truth of his crimes. However, Jesse was never forthcoming with her about any details of his life. He never even told her about his indirect causing the death of Andrea’s brother or the desire to avenge of his death or assure her that the people responsible were dead.
“Why would Gus or Walt poison Brock ?”
After Jesse and Gus leave the make shift hospital in Mexico, Gus wants Jesse to take over the superlab. Anticipating that Gus wants Walt dead, Jesse demands that Gus leave Walt alive, to perhaps “buyout” Walt and that he won’t cook for Gus if Walt is murdered.
Walt explains things very well when Jesse confronts him. Walt knows that Gus wants him dead but can’t do it unless Jesse gives the go ahead. Poisoning Brock makes it look like Walt did it (which he did). It was a successful bluff.
So here is my question: What would Gus get by poisoning Brock? I don’t get it why would he do such thing to Jesse, who didn’t do anything to him?
(sorry i watched it a long ago, can’t remember all the details)
Walt explains things very well when Jesse confronts him. Walt knows that Gus wants him dead but can’t do it unless Jesse gives the go ahead. Poisoning Brock makes it look like Walt did it (which he did). That would have finally turned Jesse against Walt.
Thanks for the warning! I’m at 5.2. Didn’t want to ready and spoilers past this point. Kudos.
Hi. Thanks for creating a place to think about this very important issue !
After my 4th viewing of these wonderful series, I still think there are many loose ends to this Lily of the Valley story :
– The difficulty of getting Brock to swallow a sufficent dose of poison : bringing it to him, making him eat or drink the right quantity, etc … Not something a Walt or even a Saul would leave to chance. It couldn’t have just happened ; many less complicated developments are described at length. Why isn’t this one ?
– When Jesse begins to worry about a link between his lost ricin and Brock’s sickness, he is convinced too suddenly that there was a premeditated poisoning. Anybody would go looking for some remains of the plastic ricin holder. Jesse should have thought Brock could have just bumped into it. Trying to check this possibility would have been a logical course of action, even if it meant admitting, at some point, some responibility to Andrea.
– Why would Gus or Walt poison Brock ? In the story, the poisoning convincingly triggers Jesse’s fury because we know he is a child protector. But it doesn’t make sense. Gus certainly has no reason, as Brock is a complete outsider to him. And it is much too tricky for Walt who would be the first suspected (as he was), and should have had too much difficulty convincing Jesse it was Gus’s fault.
Actually there is a need for 2 or 3 more episodes to make all this hold together. C’mon Vince, back to work !
Bravo, and thank you Emilia. I’m an admin for a very large (over 10,300) BrBa group on Facebook. The “How’d Walt poison Brock?” question still comes up regularly. For a long time I tried to explain it, but having links at my fingertips sure saves a lot of typing, and skepticism! I can’t tell you how many times I’ve shared your explanation with the group. It ALWAYS works, and saves me soooooo much time! Your writing is easy to follow, and you’ve covered all the bases. Aaaaand it seems they believe you faster than they believe me! Thank you so much for covering the BIG question so well, and if you ever want to join the group, I have a spot reserved for you!
You’re the one who rocks!
Hey, I completely ignored this series when it was broadcast (on cable TV here) and now I’m making a full immersion on it. Finished season 4 yesterday and got to this post thanks google.
Thanks for this great in-depth look. I’m stopping now till I finish S.5 in a week or so. Cheers/D
I’m just now getting into Breaking Bad and I’m loving binging on it. It would have been painful waiting a week between episodes. Of course, I’m completely sleep deprived, obviously.nI just saw the episode revealing Brock was poisoned by Walt. I figured it out beforehand and my stomach lurched. I didn’t fully believe it until the lillies of the valley were shown. Devastating! Since then, I’ve been wondering, do we know for a fact that Gus and his people killed Andrea’s other son or is it possible Walt killed him to get Jesse to kill Gus? I don’t put anything past Walt. He’s really gone to the dark side.
How Walt got the poison to Brock had always mystified me, and seems to me a major plot hole. Your explanation of Walt as the “evil juice box man” makes sense, except for one thing, episode 53, Walt is at Jesse’s house discussing the design for their new mobile lab, when Andrea and Brock come in – Brock makes no indication that he knows or has ever me Walt. Sure, he’s a shy kid, but dine stranger shows up add gives you something (juice box out whatever) and you then get sick and almost die – I don’t care how old or shy, if you see that guy again you’d say something most likely. The juice box theory is clever, but I don’t see it being delivered by Walt.
They never showed him poisoning broc with a juice box
She already said it was Vince Gilligan who explained the “evil Juicebox fairy”. Ultimately this explanation just goes from her having a really good theory, to simply repeating what Vince Gilligan’s said. Given that he is the brilliant mind behind the show, I would say that’s the brilliant gist of it…. But I have to agree the person who wrote this is awesome in my opinion. I enjoyed reading every word. Regardless of any nuances I may have come across ;)
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Really enjoyed this post. Great detail
The science geek
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Okay… it is November of 2016 and I finally signed up for Netflix, almost entirely to binge-watch Breaking Bad. In the last 12 days I have gotten through the first FOUR seasons (thank God for retirement!). The one I’m ending on now before going to season five, the final season, was about Brock being poisoned. Because I did not understand it and really needed to in order to continue with the series, I logged on to this site and I’m very happy that I did.
I have to say that in no way, shape or form did I ever imagine or consider that Walt poisoned this child. Like Jesse, I was finding every reason or excuse possible to exempt Walt from this despicable behavior. Now I need to go forward really thinking that this is in fact the truth.
On another note, I paused and rewound the final episode of Season 4 like 15 times, for deeper reviewing, when Gus exits the retirement center room after the bomb has exploded. Of course we all thought, this man is ungodly invincible in every way, and no one could ever EVER kill him. Then the camera angle shifted to show the entire right side of his face, which completely exploded along with the upper half of his body on the right side. I viewed this over and over, trying to see how they actually removed a big chunk of his face (and right eye) that was destroyed. This was not makeup… it probably was special effects added later, but it was so absolutely mind-blowing that it made a huge impression on me.
Anyway, thanks for the explanation of this last episode I just viewed, and now I’m going back down to binge-watch the final, Season 5. I do have to admit that I checked online during Season 2 just to ask if Walter dies in the end. I could not bear the suspense not knowing. So now I am ready to accept and absorb all that this exciting final season will present to me!
Holy man!!! I totally get and revere all the excitement that this amazing show generated in its heyday.
This clears alot, thank you
Breaking Bad kicks ass!
Thanks a million for the explanation…kudos there
Thanks yo , Breaking Bad rocksssss !
I just finished watching the whole series and was curious about Brock being poisoned so I came here for answers and everything you said does make sense. I’m thinking it wasn’t saul who delivered the poisoned juice or snack because later on season 5 episode 13 Walt visits Andrea to ask if she had seen Jesse and when he talks to Brock you can tell Brock doesn’t like him by the way he ignores him then stares into his eyes. I’m thinking it was Walt who gave him the poison directly
Wow you sure do know how to drag on and on and on. You can actually make an exciting story extremely boring. I had to barely skim over a lot of it because it just didn’t matter what so ever and draged on way too long. Stick to the story at hand and don’t drag on sooooooooooooooooooooooo much about such unimportant details.
sorry, all of this doesn’t hold, and it would never happen in a Colombo episode :
* how the ‘lily of the valley’ could be connected or confused for ricin, are all poisons the same for any serious investigator?
* how from getting deprived of his pot, assumedly for his own good, can he conclude that they also stole the ricin from him?
* how Walt could convince Jesse that Gus had a motivation to poison Brock ( he had none for whatever angle you consider his position ) ?
no, this part of the story is jerky and cannot be really believed in, i prefer to believe good ol’ Colombo, with all the respect to the rest of the story.
> how the ‘lily of the valley’ could be connected or confused for ricin, are all poisons the same for any serious investigator?
Toxicology reports aren’t generated instantaneously. The investigators only thought it was poison. Jesse foolishly outted his knowledge of ricin. Anyway, it’s kind of irrelevant at that stage.
> how from getting deprived of his pot, assumedly for his own good, can he conclude that they also stole the ricin from him?
Jesse realized that Saul employed someone, Huell, with pickpocket skills and that those same skills were used when his ricin cigarette was thought to be lost.
> how Walt could convince Jesse that Gus had a motivation to poison Brock ( he had none for whatever angle you consider his position ) ?
When Jesse had issues with the use of a child, Tomas, in Gus’ operation, Tomas became a problem. It’s unclear if Tomas was murdered by Gus or Gus’ corner dealers. Walt’s argument was Gus had no problems with harming children to achieve his goals.