John Agar
Dr. Curt Taylor (archive footage)
?
Ethan Allen
(archive footage)
John Ashley
Stan Kenyon (archive footage)
Susan Bjurman
Anne Taylor (archive footage)
Bob Cowan
Cpl. Culver (archive footage)
Warren Hammack
Lt. Robertson (archive footage)
Cynthia Hull
Susan Rogers (archive footage)
Tony Huston
Culver's Sergeant (archive footage)
?
Bill Peck
(archive footage)
?
Jordan Lopez
Rakor space gorilla (uncredited)