Roy Werner

A soldier renowned for his tracking abilities suffers brain damage from a bomb blast while serving in Iraq, but when he recovers, discovers he has gained rare skills that enable him to find people or objects the authorities cannot. However, the incident has left him with eccentricities that make him difficult to work with, so he relies on support from his legal advisor and friend Leo Knox while working on cases.

When a government witness is murdered, the FBI hires Cal and co to determine who was responsible for leaking the victim's whereabouts. The team are also tasked with keeping Agent Reynolds, who is key to closing the case, out of harm's way. However, suspicions are aroused when Reynolds refuses to testify.

A renegade Sloane holds the secrets to a mysterious Rambaldi device's powers, while Vaughn begs an uncooperative Dixon to help the CIA in rescuing Sydney.