Criminal Minds on CBS

Season eight of the drama begins with Alex Blake's (Jeanne Tripplehorn) first case with the BAU, in which the team travels to Texas after an ambulance carrying an UnSub known as "The Silencer" overturns on a highway. Reid's personal and professional life collide as he becomes romantically attached to a scientist whom he only speaks to over the phone, but she may be harboring a dark secret.

Season eight of the drama begins with Alex Blake's (Jeanne Tripplehorn) first case with the BAU, in which the team travels to Texas after an ambulance carrying an UnSub known as "The Silencer" overturns on a highway. Reid's personal and professional life collide as he becomes romantically attached to a scientist whom he only speaks to over the phone, but she may be harboring a dark secret.

Alice stops by a nervous Vincent's house. Watch an All New 'Criminal Minds' on April 29.

Season 2 of Criminal Minds begins where Season 1 leaves off with the conclusion of "The Fisher King." Keith Carradine guest stars as a prolific serial killer who matches wits with Gideon. There is plenty for the members of the BAU team to deal with.

The team begins to get inside the mind of an elusive arsonist.

James Van der Beek guest stars on CBS' 'Criminal Minds.'

James Van der Beek guest stars on CBS' 'Criminal Minds.'

James Van der Beek guest stars on CBS' 'Criminal Minds.'

James Van der Beek guest stars on CBS' 'Criminal Minds.'

The season begins where the fifth left off, with the BAU's search for the Prince of Darkness. Later, Rossi comes face to face with a case that has haunted him for years. Garcia reveals some of her personal life in order to help identify an unsub. JJ decides to leave the team after getting a new job offer, but may not be gone for good.

J.J. and Prentiss are back for Season 7 of Criminal Minds and so is the rest of the BAU team as they track down UnSubs across the country.

Season 4 begins with the aftermath of the explosive Season 3 cliffhanger involving a group of terrorists. Cases involving abused children, a cop killer, a modern day Road Warrior, and an Unsub who copies the murders of famous serial killers are just some of the high points of a truly dark season.

The season begins where the fifth left off, with the BAU's search for the Prince of Darkness. Later, Rossi comes face to face with a case that has haunted him for years. Garcia reveals some of her personal life in order to help identify an unsub. JJ decides to leave the team after getting a new job offer, but may not be gone for good.

J.J. and Prentiss are back for Season 7 of Criminal Minds and so is the rest of the BAU team as they track down UnSubs across the country.

During Season 3, FBI profiler Gideon (Mandy Patinkin) begins to doubt his abilities and sanity in the aftermath of the murder of his girlfriend at the end of last season and ultimately leaves the BAU.