Teaser! Shemar Moore’s ‘Criminal Minds’ Character’s Warning for the BAU

Check out a new clip of tomorrow’s season finale of “Criminal Minds.”

In the teaser, Shemar Moore makes his return, and his character Derek Morgan has something to tell the BAU at 3 in the morning.

Shemar exited the show last year. In his storyline, he survived a kidnapping, but decided to leave the BAU to focus on his family.

“Criminal Minds” airs Wednesday nights on CBS.