A dangerous cartel leader is at large and Intelligence has to rely on Pulpo to track him down.

Intelligence is thrown when an undercover job turns into a manhunt for two brothers. Voight is under scrutiny as Jin's murder investigation transpires in the Season Premiere.

Atwater (LaRoyce Hawkins) is settling into his new gig on intelligence as Antonio (Jon Seda) is relegated to desk duty while recovering. Lindsay (Sophia Bush) finally realizes she has no way out and confides in Voight (Jason Beghe) for h...

Atwater (LaRoyce Hawkins) is settling into his new gig on intelligence as Antonio (Jon Seda) is relegated to desk duty while recovering. Lindsay (Sophia Bush) finally realizes she has no way out and confides in Voight (Jason Beghe) for h...

The Intelligence Unit is truly family in the season finale.

In the season finale, Voight discovers Jin's secret and an old friend forces Lindsay to repay a debt.