"Jonas is in London working on discovering the connection between a Russian uranium dealer and his old friend from MI5. On the home front, Kim is confronted by a suicidal caller on her talk show, Bob gets a promotion to Sergeant First Class, and Charles is having an internal struggle about dating his late-friend-and-teammate Hector Williams' ex-girlfriend."

"After completing a five-month-long assignment, the team is called upon to stop an assassination plot targeting the president-elect and vice president-elect. The situation raises suspicion among high-level government officials. Back at the base, the Unit wives are relocated for their own safety due to the sensitive nature of their husbands' mission."

"The team tails an important scientist from Argentina to South Africa on a commercial flight, when unidentified hijackers take over. Meanwhile, Kim and Bob's baby is ill, while the spouses continue their adjustment to their new lives."