- Country: USA
- Genres: Sci-Fi
- Release:
- Director: Frederick Stephani
- Writers: Alex Raymond
- Language: English
- Stars: Buster Crabbe , Jean Rogers , Frank Shannon
- Runtime: 97 min
- Awards: N/A
- AKA: Spaceship to the Unknown , Spaceship to the Unknown (India) , Spaceship to the Unknown (United States of America)
- Plot: Flash Gordon, Dale Arden and Dr. Alexis Zarkov visit the planet Mongo to thwart the evil schemes of Emperor Ming the Merciless, who has set his planet on a collision course with Earth.
- IMDB:tt0061006
Spaceship to the Unknown Cast · · · ALL
Frederick Stephani
Director
Buster Crabbe
Flash Gordon (archive footage)
Jean Rogers
Dale Arden (archive footage)
Frank Shannon
Dr. Hans Zarkov (archive footage)
Charles Middleton
Ming the Merciless (archive footage)
Priscilla Lawson
Princess Aura (archive footage)
Richard Alexander
(I)
(1902–1989)
Prince Barin (archive footage)
Jack ‘Tiny’ Lipson
King Vultan (archive footage)
James Pierce
Prince Thun (archive footage)
Earl Askam
Officer Torch (archive footage)
Richard Tucker
Prof. Gordon (archive footage)
George Cleveland
Prof. Henson (archive footage)
Lon Poff
The High Priest (archive footage)
Charles McMurphy
Atom Furnace supervisor (archive footage)
Theodore Lorch
Priest #2 (archive footage)
Lynton Brent
Transcontinental airplane pilot (archive footage) (uncredited)
Al Ferguson
Telescreen monitor (archive footage) (uncredited)
Fred Kohler Jr.
Robot / Ming soldier (archive footage) (uncredited)
Bull Montana
Monkey-Man (archive footage) (uncredited)
Constantine Romanoff
Monkey-Man (archive footage) (uncredited)
Glenn Strange
Robot / Ming soldier / Gocko (archive footage) (uncredited)
Harry Wilson
Captured soldier (archive footage) (uncredited)