Voight entrusts his former cellmate to help intelligence take down a cocaine kingpin. (42:18)

The team investigates a string of violent home invasions to find the common threat. (41:25)

An investigation becomes personal for Voight when an acquaintance from his past is caught putting others lives in danger. (42:59)

The investigation into a dead body found at the bottom of Lake Michigan points to Voight's social circle. (42:24)

An investigation is launched when the team discovers the body of a government official. (42:24)