Breaking Bad set the stage for a pulsating season four finale last night, delivering a tense Walt/Jesse showdown and posing a question that we presume will be answered on next week's "Face Off."
Who poisoned Brock?
Walt convinced Jesse that Gus was behind the dastardly plot, but many readers have proposed the theory that Gus turned around in the parking garage last night because he suspects something is amiss - and Walt is actually to blame for the Ricin incident. Will we get an answer on the fourth season finale?
Tune in. Find out. And get your first look at the episode via the following AMC preview: