<P> Derek Morgan is a fictional character on the CBS crime drama Criminal Minds , portrayed by Emmy Award winner Shemar Moore . Morgan specializes in fixations and obsessive behaviors . He is a Supervisory Special Agent of the FBI 's Behavioral Analysis Unit , ( although has served as interim unit chief for Aaron Hotchner ) , and has appeared from the series ' pilot episode `` Extreme Aggressor '' , which was originally broadcast on September 22 , 2005 . Before he left in season 11 , he was one of only three main characters to appear since the first season as `` starring '' , while also becoming the only character to appear in all episodes . </P>
<P> Derek Morgan is a fictional character on the CBS crime drama Criminal Minds , portrayed by Emmy Award winner Shemar Moore . Morgan specializes in fixations and obsessive behaviors . He is a Supervisory Special Agent of the FBI 's Behavioral Analysis Unit , ( although has served as interim unit chief for Aaron Hotchner ) , and has appeared from the series ' pilot episode `` Extreme Aggressor '' , which was originally broadcast on September 22 , 2005 . Before he left in season 11 , he was one of only three main characters to appear since the first season as `` starring '' , while also becoming the only character to appear in all episodes . </P>
what season of criminal minds does derek leave
what season of criminal minds does derek leave
in season 11
in season 11