John Thaddeus

The BAU team must profile a serial killer covered in tattoos who commits suicide, but leaves clues to the whereabouts of his last victim. Green Bay Packers wide receiver Greg Jennings guest stars as an evidence tech at a crime scene, and Dean Norris ("Breaking Bad") guest stars as Detective Barton.

Jane and Maura are asked to present the case of a serial killer at a symposium for law enforcement; Jane and Maura make a discovery.

Determined to recover millions of dollars worth of stolen Iraqi art, DiNozzo must go undercover and help a prisoner escape from a military detention centre, unaware that the man he is helping may also be a dangerous killer.

In order to save the life of a young girl who needs a transfusion, Lucy and Carter search Chicago to locate her father, who is a perfect match for her rare blood.

Denny takes a paternity test to find out if he is Bethany's father, while Lincoln Mayer returns and sets his sights on Shirley.

Shirley attempts to reason with her kidnapper, Lincoln Meyer; Jerry Espenson's legal skills shine as he and Alan defend a woman accused of killing her ex-girlfriend; seeing Jerry and Alan bonding makes Denny Crane jealous.