Giving up her career after her stand-in is murdered, alcoholic film star Carla Berotti (Patricia English) takes the first ship to Canada. Here she is blackmailed into acting as a courier for her husband, a double agent. It so happens that Carla's personal physician is Dr. Martin King (Jon Rollason) -- who, of course, is a close associate of John Steed. Apprised of the situation, Steed books passage on the ship in hopes of rounding up the villains once and for all. Written by Lester Powell, "Mission to Montreal" first aired in England on October 27, 1962, and was first shown in America on January 31, 1991. ~ Hal Erickson, Rovi