Director : Joseph M. Newman
Producer : William Alland
Written by Franklin Coen, Edward G. O'Callaghan
Story "The Alien Machine" by Raymond F. Jones
Director of Photography : Clifford Stine
Music : Henry Mancini, Hans J. Salter, Herman Stein
Production Designers : Alexander Golitzen, Richard H. Riedel
Costume Designer : Rosemary Odell
Film Editer : Virgil W. Vogel
Cast
Jeff Morrow (Exeter)
Faith Domergue (Dr. Ruth Adams)
Rex Reason (Dr. Cal Meacham)
Lance Fuller (Braack)
Russell Johnson (Steve Carlson)
Douglas Spencer (The Monitor of Metaluna)
Robert Nichols (Joe Wilson)
Karl Lindt (Dr. Adolph Engelborg)
Eddie Parker (Mutant)
Olan Soule (First Reporter)
Les Spears (Reporter)
Lizalotta Valesca (Dr. Marie Filchner)
Robert B. Williams (Webb)
Jack Byron (Photographer)
Spencer Chan (Dr. Hu Ling Tang)
Coleman Francis (Express deliveryman)
Mark Hamilton (Metaluna Inhabitant)
Guy Edward Hearn (Reporter)
Edward Ingram (Photographer)
Assistant Director : Fred Frank
Art Directors : Alexander Golitzen, Richard H. Riedel
Special Effects : Charles Baker, David S. Horsley, Clifford Stine
Optical Printing : Roswell A. Hoffmann
Mutant Design : Millicent Patrick
Mutant Construction : Robert Hickman, Jack Kevan, Chris Mueller
Make-Up : Bud Westmore
Hair Styles : Joan St. Oegger
Set Decorators : Russell A. Gausman, Julia Heron
Color Consultant : William Fritzsche
Music Supervisor : Joseph Gershenson
Sound : Leslie I. Carey, Robert Pritchard