Augie Steenbeck
Midge Campbell
Stanley Zak
General Gibson
Dr. Hickenlooper
The Host
Conrad Earp
Schubert Green
J.J. Kellogg
Sandy Borden
Roger Cho
Montana
June Douglas
The Motel Manager
The Mechanic
Saltzburg Keitel
The Aide-de-Camp
Woodrow
Dinah
Clifford
Shelly
Ricky
Andromeda
Pandora
Cassiopeia
Waitress
Cashier
Cook
Romulus
Bus Driver
Chaperone
Bernice
Billy
Dwight
Other Pupil
Other Cowboy
Bodyguard/Driver
Motel Handyman
Conrad Earp's Secretary
Larkings Executive
Detective #1
Detective #2
Mary
Military-Science Ensign
'Stunt Double'
The Alien
Polly
Lunky
Telephone Booth Guard
Mrs. Weatherford
Skip Weatherford
Newsboy
The Actress / Wife
Backstage Sound Man
Engineer
Pilotman
Brakeman
Hobo
Caddy
Outlaw on the Run
State Trooper
Cameraman
Motel Guest (at Shower)
Motel Gardener
Motel Maid
T-Shirt Vendor
Bookseller
Man with Soda
Hot Dog Stand
Girl on Blanket
Souvenir Booth
Boy in Spacesuit
Ferris Wheel Crew
Other Actor / Student
Scientist
Scientist / Military-Science Officer
Train Porter
Seamstress
Recording Secretary
Military-Science Officer
Military-Science Guard
Parent on TV Screen
Chaperone 2 (uncredited)