Bishop comes to McCall, Harry and Mel for help when a terrorist from his past uncovers the identity of his adult son, a young man Bishop has kept secret for…

A former janitor becomes a potential key witness, but Peter and Sam struggle to track him down. Meanwhile, they examine a student trip to Costa Rica.

The task force’s investigation into Arcane Wireless, an untraceable cellular network for criminals, leads to unexpected consequences. Red races against the clock to get a colleague out of trouble.