"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."

"The Unit's newest member and his wife quickly learn the ropes from the team and their wives after terrorists hijack a plane and threaten to blow it up."

"Bob is left behind to face tough questions from the FBI concerning the plane hijacking while the other team members are sent to Africa to recover a downed Chinese military satellite."