CBS | 8:00 pm

There’s a bad egg in the FBI, and it’s up to Mac and Jack (Lucas Till, George Eads) to reel him in — somewhat literally — in "Fish Scaler." The corrupt agent has set someone else up to be charged with a murder. New boss Matty (Meredith Eaton) prepares to issue performance reviews, making the team members rather concerned. "Saturday Night Live" alum Siobhan Fallon Hogan and Frank Whaley guest star. Justin Hires and Tristin Mays also star.