In order to save an assassinated scientist, a submarine and its crew are shrunk to microscopic size and injected into his bloodstream.
as Grant
as Cora
as General Carter
as Dr. Michaels
as Col. Donald Reid
as Capt. Bill Owens
as Dr. Duval
as Jan Benes
as Communications Aide
as Secret Service
as Nurse
as Technician
as Wireless Operator
as Military Policeman (uncredited)
as Dr. Sawyer (Hypothermia technician) (uncredited)
as Henry - Heart Monitoring (uncredited)
as Young Scientist (uncredited)
