Criminal Minds is set primarily at the FBI's Behavioral Analysis Unit (BAU) based in Quantico, Virginia.
In accordance with the show's plot, Criminal Minds differs from many procedural dramas by focusing on profiling the criminal, called the "unsub" or "unknown subject", rather than the crime itself. Cook, Kirsten Vangsness and Shemar Moore are the only actors to have appeared in every season.
It premiered on September 22, 2005, on the broadcast network CBS and October 5, 2005, on CTV.
He struggles to balance the demands of his job with his family life, but his wife Haley Brooks (Meredith Monroe) divorces him in season three.
In the episode "100" (season 5), Haley is killed by fugitive serial killer George Foyet (C.
He left letters of apology for his fellow cast members, explaining his reasons and wishing them luck. In season six, Jennifer is forced to accept a promotion at The Pentagon, causing her to leave the BAU. Although she survives, she does not appear for the rest of the season.
Joe Mantegna replaced him as David Rossi, a best-selling author and FBI agent who comes out of retirement. Cook and Brewster were both replaced by Rachel Nichols as Ashley Seaver, an FBI cadet.
CBS's decision to release Cook and Brewster from their contracts resulted in numerous fans writing angry letters to the studio and signing protest petitions.