Buster Crabbe
Flash Gordon (archive footage)
Acting
Jean Rogers
Dale Arden (archive footage)
Acting
Frank Shannon
Dr. Hans Zarkov (archive footage)
Acting
Charles Middleton
Ming the Merciless (archive footage)
Acting
Priscilla Lawson
Princess Aura (archive footage)
Acting
Richard Alexander
Prince Barin (archive footage)
Acting
Jack 'Tiny' Lipson
King Vultan (archive footage)
Acting
James Pierce
Prince Thun (archive footage)
Acting
Earl Askam
Officer Torch (archive footage)
Acting
Richard Tucker
Prof. Gordon (archive footage)
Acting
George Cleveland
Prof. Henson (archive footage)
Acting
Lon Poff
The High Priest (archive footage)
Acting
Charles McMurphy
Atom Furnace supervisor (archive footage)
Acting
Theodore Lorch
Priest #2 (archive footage)
Acting
Duke York
(scenes deleted) (archive footage) (as Duke York Jr.)
Acting
Lynton Brent
Transcontinental airplane pilot (archive footage) (uncredited)
Acting
Al Ferguson
Telescreen monitor (archive footage) (uncredited)
Acting
Fred Kohler Jr.
Robot / Ming soldier (archive footage) (uncredited)
Acting
Bull Montana
Monkey-Man (archive footage) (uncredited)
Acting
Constantine Romanoff
Monkey-Man (archive footage) (uncredited)
Acting
Glenn Strange
Robot / Ming soldier / Gocko (archive footage) (uncredited)
Acting
Harry Wilson
Captured soldier (archive footage) (uncredited)
Acting