CBS | 10:00 pm

In a taut new episode called "The Black Forest," Mitch’s (Billy Burke) dangerous alter ego, Mr. Duncan, savagely attacks the team’s plane and then flees, prompting Jamie, Abe and Max (Kristen Connolly, Nonso Anozi, guest star Robin Thomas) to set off on foot, trying to find and help their disturbed friend. Athena Karkanis and Michael Hogan also guest star; James Wolk also stars.