Something shady is about to go down at CBI headquarters.

TV Guide is mum on the details, but simply confirms that the November 18 episode will conclude with an event that "casts suspicion on the organization's employees."

Enter Pruitt Taylor Vince.

The actor will debut on December 9 and portray Agent J.J. Laroche, the head of CBI's Internal Affairs.

Reportedly, the character will be socially awkward and strictly professional. He'll also suffer from nystagmus, a condition that causes one's eyes to move involuntarily.  

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.