S9·E57 Punch Drunk

Called to attend to a pub brawl, PC Tony Stamp and PC Dave Quinnan are stunned to find one man unconscious and the other Sun Hill's own DS Ted Roach. Roach is taken back to the station, and while DI Frank Burnside manages to pursuade the victim to drop the charges against him, nothing can be done when Roach headbutts Insp. Andrew Monroe during a heated argument. Ch. Supt. Brownlow calls in MS15 to investigate him, but Roach turns in his warrant card and walks out of the station.