Skyler, Walt Jr., and Holly go into DEA protection at Hank's at Marie's insistence. Hank harries ex-partner Steve into investigating the laundry; as Steve looks around there, Gus calls Jesse in the lab to tell him what's happening is Walt's fault, but Jesse still refuses to "sign off" on eliminating Walt. Saul summons Jesse to his office, where he's anxiously packing up, saying it's the "end times"; he gives Jesse's savings to him and tells him Gus threatened Walt's family. Andrea calls Jesse to the hospital because her son Brock is in critical condition with a mysterious flu-like illness. Jesse, suspecting what has happened, fishes for a cigarette, finds the ricin vial missing and tells Andrea to have the doctors treat Brock for poisoning. Jesse goes to Walt's house, where Walt has barricaded himself inside with just a revolver for protection. As Walt rambles, Jesse picks up the gun and accuses Walt of poisoning Brock; Walt pleads for his life and tells him Gus must be behind the poisoning, goading Jesse to kill Walt. Walt presses the revolver against his forehead, daring Jesse to kill him but Jesse can't, as he believes Walt. Jesse is now determined to kill Gus, but Walt tells Jesse to let him help. Walt rigs small explosives and plants them on Gus's car while Gus meets with Jesse in the hospital chapel, where he tells Jesse to return to work immediately. But Jesse faces him down, telling him only that Brock has been poisoned; Gus tells Jesse he may return next week. Gus walks back to his car in the garage, while Walt watches from a nearby rooftop through binoculars, ready to detonate the explosives. However, Gus seems to suspect something and walks away from his vehicle, dashing Walt's plan.