When a bombing at a local restaurant leaves several injured or dead, including a congresswoman and someone close to Isobel, the team races to apprehend the suspect before another explosive goes off.

When a retired FBI agent is tortured and killed while working a security job, Scola and Nina (FBI: MOST WANTED) go undercover as a married couple deep in the diamond game as the team tries to find out who is responsible. During the course of his and Nina's dangerous assignment, Scola is plagued by the possibility that their son Doug could end up parentless.