Lisa Kaminir

Dexter's world is rocked when a rival serial murderer, dubbed the Ice Truck Killer, privately contacts him and reveals that he knows Dexter's grisly secret.

Meredith becomes disenchanted with her ignorance of parts of Derek's life; Alex treats a patient whose religious beliefs jeopardize her chances for recovery; a 40-year-old pregnant woman diagnosed with cancer disagrees with Cristina's advice.

As the BAU wraps up an investigation into unusual stabbings in Upstate New York, Morgan's visit with one of the crime's survivors could uncover more questions left for the team to answer. Guest stars include Aasha Davis and Emayatzy E. Corinealdi.

Danny and Baez investigate a possible serial killer who sends a chilling message to Danny, and Erin toys with the idea of applying for a judgeship.

A chance encounter with a military colonel (guest star Aaron Raymond) leads Jane to believe the officer is hiding something, prompting him to dig into the closed murder case of the man's wife.

A Sudanese native wants to sue the U.S. government for the lack of action taken against the mayhem happening in his country and Paul looks to Lori to take the case. Founding partner Shirley Schmidt arrives with a mission to bring order to the firm.