Exclusive: Criminal Minds Team Faces Off Against Housewives Baddie Mark Moses

Desperate Housewives‘ resident troublemaker Mark Moses is taking his well-honed antagonist act over to Criminal Minds.

Moses will guest star in the CBS procedural’s Sept. 21 season premiere. The actor, who also had a memorable run on Mad Men as Herman “Duck” Phillips, will play a senator heading up a committee tasked with investigating a case that the BAU team screwed up.

As TVLine previously reported, the season opener picks up four months after the events of May’s finale and will feature flashbacks of the case being scrutinized by Moses’ character. The episode also marks the re-introduction of Paget Brewster’s “dead” Prentiss.