First Look: Shemar Moore Returns to 'Criminal Minds'
Moore starred as Derek Morgan on the CBS procedural from 2005 until his departure in 2016. He most recently appeared in the Season 12 finale.
In his Season 13 return to the series, Derek helps the BAU's Penelope (Kirsten Vangsness) deal with an emotionally trying case.
Criminal Minds, Wednesdays, 10/9c, CBS