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.

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.

The crew of the Serenity are forced to seek help from the Alliance when Book is critically injured in a firefight.

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.

In an effort to relieve his pain over Tia, Alan goes with Denny to do some fly-fishing and relaxing in British Columbia, where they learn that fish are being threatened by sea lice.