Melissa Carlson

As Dawson's life hangs in the balance, Voight focuses his team on bringing in the man who shot him, Pulpo, by hook or by crook.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter, and Ruzek goes to Burgess for help with an undercover mission.

A case which sees one of the team taken hostage by a father who is demanding that Intelligence find his daughter who he believes has been kidnapped.

Having survived a car bomb attack that nearly killed himself and his family, Hank uses any means necessary to get his hands on the man he holds responsible, a drug dealer recently released from prison.

The team are put on high-alert after a mother reports that her son has gone missing and is believed to be in possession of a firearm, and that a recent entry in his journal spoke of him wishing to get revenge.

When the father of a dead girl mentions the name Dennis Lee, Olinksy sets out to bring down one of Chicago's most wanted fugitives and people traffickers, once and for all. Meanwhile, Sean has an altercation with a fellow officer, and Platt helps Nadia prepare for a polygraph test.