Watch _DUPE_The Squad: Prison Police

The clock is ticking when an inmate escapes Tennessee Prison. Special agents lead a statewide manhunt to capture the fugitive before he reaches state lines.

Special Agent Fisher searches for the source of drugs coming into the prison--going undercover to monitor prisoners' visitors, search a cellblock, and work with an inmate informant to set up a sting.

Tired of finding illegal drugs inside the prison, investigators attack the source--smugglers on the outside; a surprise search of hundreds of prison visitors uncovers deadly packages for smuggling.

An inmate with a shank sticking out of his stomach is rushed to the infirmary. No witnesses. No security video. Just before losing consciousness, the victim gave special agents a big lead on the case.

The Squad fears that prison gang members are running an extortion game when an inmate's family starts receiving violent threats from a mysterious caller with ties to the Crips.

An anonymous letter from an inmate threatens to raise a small army and attack the correctional officers. Could there be a possible Aryan Nation connection to the threat?

The Squad investigates a major drug smuggling operation potentially connected to the Crips, abetted by a source outside the prison. The Squad heads to the community for a dramatic street bust.

An inmate collapses and dies from multiple stab wounds. Police collect forensic evidence, parse surveillance video, and explore a possible connection to the deadly El Salvadoran gang MS-13.

Two inmates suffer life-threatening stab wounds during a melee on the exercise yard that involved one shank, one pool stick, and two rival gangs.

An inmate risks his life to become an informant, helping special agents to eliminate the inmates' outside drug source.