America's Meth Kitchen. Walt is once again working solo, and the security camera is still following him. While he shows no signs of going off-routine, when he enters the break room -- outside the purview of the camera -- he suddenly re-applies his safety gear, goes to the toaster oven (!!), and pulls out a dish of perfectly cooked ricin. Also, of course we get a POV shot from inside the toaster oven, because before this show is finished, we'll have gotten a POV shot from every inanimate object in New Mexico.
Cut to Jesse, examining a vial of the ricin, incredulous that Walt could have made it in the lab. Walt thinks it's appropriate that he engineered the instrument of Gus's destruction right under his nose. Jesse doesn't think there's very much of it; there was more when they were planning to dose Tuco. Walt says it's no matter; it's enough to get the job done. As Walt says, Jesse can't go after Gus with a gun and live to tell the tale; with the ricin, he just slips it into Gus's drink, and 36 hours or so later, he'll drop dead, and everybody will figure it was a heart attack. "What about Mike?" Jesse asks. Suddenly, this question looms larger than it might have before. "Mike will have his suspicions," Walt allows, "but that's all they'll be." Jesse makes an "O RLY?" face, which annoys Walt. This inferiority complex between him and Mike does not bode well for him. "Please," he scoffs. "One homicidal maniac at a time." Jesse doesn't know when he'll see Gus again, if ever, but Walt just tells him to hold on to the ricin. "When you have the opportunity, be ready." To avoid a search, Jesse decides to put the ricin into a cigarette, which he then places upside down in his pack. "My lucky cigarette." Oh, like THAT isn't going to come back and bite somebody in the ass at the worst possible time. (Also, won't packing it in toasted tobacco affect the whole "tasteless, odorless" charm of the ricin?) Walt smirks: "Whatever you do, don't smoke it."