Skyler, Walt Jr., and Holly go into DEA protection at Hank and Marie's insistence. Andrea calls Jesse to the hospital because her son Brock is in critical condition with a mysterious flu-like illness. Jesse finds the ricin vial missing. Walt tells Jesse that Gus must be behind the poisoning. Walt attempts to kill Gus with a car bomb, but Gus is able to get away from his vehicle.
Writer: Thomas Schnauz|Moira Walley-Beckett