A man claiming to have the missing bomb takes hostages on a passenger ferry, but is he for real or not? Rachel discovers a connection between he and the girl who died on the school excursion. Dismissed from duty due to a weak heart, Jim dives the site of the ferry wreck to locate the fourth bomb in order to eliminate the hijackers threat.

Frank's brother Jimmy is released from prison after two years. He is unhappy when his wife shows him some money, and immediately assumes it was from Frank.