In the Dark

"In the Dark" is the seventeenth episode of Season Twelve of Criminal Minds.

Summary
The BAU work to determine if two serial killers with different M.O.s are operating simultaneously. Also, the team worries about Reid's safety.

Guest Cast

 * Eddie Alfano - Frazier
 * Diego Amarosa - Duerson
 * Jhey Castles - Newscaster
 * Drew Fonteiro - Jon Kreutzmann
 * Phillip Garcia - Luis Delgado
 * Jeananne Goossen - Fiona Duncan
 * Alexander Harris - Officer Peters
 * Gary Kasper - Samuel Gordon
 * Ian Kerch - Paul McConnell
 * Jeffrey Markle - M.E. Harry Greenberg
 * Harold Perrineau - Calvin Shaw
 * Matt Raimo - Mike Hood
 * Emmanuelle Roumain - Janis Weir
 * Heidi Sulzman - Sergeant Suzanne Kuroda
 * Atticus Todd - Chess Inmate
 * Johnny Wactor - Trey Gordon
 * Ebboney J. Wilson - Lyn Anastasio
 * Oleg Zatsepin - Bob Joplin

Trivia

 * This is the sixth of six episodes to deal with two separate cases. The first two are Damaged and The Crossing, both of Season Three, while the other three are Collision Course, Alpha Male, and Assistance Is Futile, all three of which are from Season Twelve.
 * Gary Kasper, the actor portraying Samuel Gordon, previously appeared in the Season Six episode Supply and Demand, in which he portrayed The Cleaner.