King of the Mounties is a 1942 Republic 12-chapter film serial, directed by William Witney. Allan Lane played Sgt. Dave King of the Mounties, with Peggy Drake as heroine Carol Brent, and Abner Biberman played the villainous Japanese admiral Yamata.

Plot

Canada is being bombed mercilessly by a mysterious plane, which is shaped like a boomerang, and is dubbed the Falcon. The plane is under the command of Japanese admiral Yamata. The identity of the plane remains a mystery until Professor Marshall Brent and his daughter Carol arrive with a new type of airplane detector. The Axis forces are planning a Canadian invasion, and feeling that Professor Brent poses a threat to their plan, they kidnap him. RCMP Sergeant Dave King attempts a rescue, but the professor is killed when the plane in which he is held captive crashes into a riverboat.