While the team is on a protection detail at the UN, they must disarm a bomb inside a cake left in the Secretary General's office and worry if there are more bombs in the building. While on a trip to Vietnam, Molly and Tiffy search for an American GI who has been missing for 40 years as a favor for his aging mother. At home, Crystal tries to blackmail Mack by threating to tell of their one-night affair.