The inhabitants of Ganymede need to find mates from another world or they will become extinct. They soon discover a suitable breeding stock amongst the females of planet Earth.
as Dr. Jack Costain
as Ann Barlow
as Detective Supt. Hartley
as Dr. Morley
as The Major
as Cmdr. Savage
as Det. Tom Grant
as Joyce Malone
as Medra
as Thorburn
as The Sergeant
as Pvt. Higgins
as Pvt. Jones
as Madge Lilburn
as Reg Lilburn
as Col. Davy
as 2nd R / T soldier
as Police Commissioner's secretary
as First R/T Soldier
as Lieutenant
as TV Newscaster
