Thomas Vincent Kelly

A series of child abductions mean Cooper and his Red Cell team are called in to investigate who could be behind the crimes.

Jack comes face to face with archenemy Marwan for the first time, but might not be in time to prevent the stolen warhead from being fired.

Dr Pratt and his passengers, Dr Chen and Elgin, try to elude gunfire from another motorist until Pratt loses control of his car and crashes into the Chicago River. When recovered, they are hospitalised with serious injuries that soon spiral downward.

A Chinese woman escorting a group of Chinese diplomats is found murdered in one of her own tour buses, forcing Brenda and the team to delve into a world they know little about in their search for the killer.

Paranoia levels run high in the team when Jack finds himself under investigation after he is accused of coercing a confession from a paedophile.

The squad tracks down a serial killer who has been mutilating women; Ham is temporarily partnered with Butch during Bobby's absence; Earl tries to persuade Grace to help Leon.