Celeste M Cooper

A dark, secret scam is uncovered when Intelligence busts a meth lab. They discover an internet scam involving children, adopted from foreign countries, who are being sold online.

In the midst of a momentous rainstorm, Intelligence lends support to Officer Cook when she and her partner disagree about an investigation.

After a balloon filled with cocaine bursts in the stomach of a student drug mule, the team frantically search for her three missing friends who have also been used to transport drugs and have been kidnapped on their return to Chicago.

Halstead puts his career on the line to help solve a case with ties to his new girlfriend, and Voight finally discovers the mole in his unit.

The crushed body of a teenage girl is found in an abandoned building. Intelligence discover she ran away from a treatment centre. Voight sends Halstead undercover as a guard at the centre to find answers.

A hiker leads intelligence to a young woman being held captive in the woods near Chicago, and a former relationship of Halstead's comes back into the picture, much to the surprise of Lindsay.