Olinsky is stabbed in prison; Woods looks to take down Voight once and for all.

Halstead and Atwater go under cover to prevent weapons from hitting the street.

Voight witnesses the kidnapping of a young woman.

A string of stash house robberies lead back to an unlikely individual. Voight (Jason Beghe) confronts a key witness in the Bingham investigation.

Upton must take down a meth ring led by a former contact.

When a prominent Alderman known for his urban revitalization efforts is killed, Intelligence looks into the corruption haunting his neighborhood.