The team must help a rogue former Unit operator escape from a Bulgarian prison in order to have him help assassinate the world's leading arms dealer. On base, Molly takes a one time recruiting job to hire someone away from the Unit so she can put her sick mother in a nursing home.

The team is sent to Paraguay to eliminate a militia rebel leader, but the mission is put on hold when they must rescue two operators trapped by a sniper. On base, the wives help the fiancée of a deceased Unit member gain custody of her two would be step-daughters.

The team must find a terrorist who is planning to attack a nuclear waste train. On base, Kim becomes upset when she sees a strange man talking to her daughter, Serena, outside of school.