Season 4, Episode 22
The fourth season concludes with the team attempting to track down and diffuse three nuclear bombs that are targeted for undisclosed locations across the U.S., and Col. Ryan is shocked to learn who is really behind the attacks. Meanwhile, Molly informs the other wives that she is leaving Jonas; and preparations are made for Grey's wedding.
Original Air Date: May 10, 2009
Yorgo Constantine: Armen Kochenko
David Rees Snell: Leon Drake
Bryan Okes Fuller: State Trooper
Kevin Will: Man in Stall
Deborah Van Valkenburgh: Madam