Spencer Reid appeared in all 15 seasons of "Criminal Minds," but actor Matthew Gray Gubler didn't return for the "Criminal Minds: Evolution" reboot.

In a Season 1 episode of "Criminal Minds," "Aquaman" star Amber Heard played a young actor who seeks the BAU's help when her stalker becomes even deadlier.

Matthew Gray Gubler is a talented actor with a wide range, but there's one character who's going to follow him for the rest of his life. Gubler played young genius Dr. Spencer Reid in CBS's "Criminal ...