FlashForward Season 1 Episode 18 (05/06/10)
A lot goes down this week, as Demetri and Agent Banks try to track down a murderer as questions arise about the universe course-correcting itself.
Meanwhile, Mark reluctantly agrees to help Simon find his sister. However, he discovers he's withholding the truth about what actually happened with her. Also, the FBI discovers the identity of Suspect Zero and Nicole learns the whereabouts of Keiko.