查尔斯·米德尔顿
Charles Middleton
饰：Ming the Merciless
理查德·亚历山大
Richard Alexander
饰：Prince Barin [Chs. 5-13]
Richard Tucker
饰：Professor Gordon
詹姆斯·皮尔斯
James Pierce
饰：Prince Thun [Chs. 2-9, 12-13]
Duke York
饰：King Kala [Chs. 2-5] (as Duke York Jr.)
Earl Askam
饰：Officer Torch
小豪斯·彼得斯
House Peters Jr.
饰：Shark Man [Chs. 3-4]
Lynton Brent
饰：Transcontinental Plane Steward (uncredited)
Don Brodie
饰：Earth Radio Scientist [Chs. 4, 9-10, 12] (uncredited)
莱恩·钱德勒
Lane Chandler
饰：Sharkman [Ch. 4],Ming Soldier [Chs. 9-13] (uncredited)
吉姆·科里
Jim Corey
饰：Minor Role (uncredited)
William Desmond
饰：Hawkman lookout captain [Chs. 5-9] (uncredited)
Al Ferguson
Al Ferguson
饰：Spaceograph operator [Chs. 2, 4-5, 9] (uncredited)
小弗雷德·科勒
Fred Kohler Jr.
饰：Robot,Ming soldier (uncredited)
乔治·麦格瑞
George Magrill
饰：Ming soldier (uncredited)
Eddie Parker
饰：Ming Soldier (uncredited)
Constantine Romanoff
饰：Monkey man [Ch. 1] (uncredited)
Cap Somers
饰：Sharkman [Chs. 3-4] (uncredited)
格伦·斯特兰奇
Glenn Strange
饰：Robot,Ming soldier,Gocko (uncredited)
哈里·威尔逊
Harry Wilson
饰：Ugly sentry [Ch. 1] (uncredited)
巴斯特·克拉比
Buster Crabbe
饰：Flash Gordon
琼·罗杰斯
Jean Rogers
饰：Dale Arden
Priscilla Lawson
饰：Princess Aura
Frank Shannon
饰：Dr. Alexis Zarkov
Jack 'Tiny' Lipson
饰：King Vultan [Chs. 5-13]
Theodore Lorch
饰：High Priest #2 [Chs. 8-11, 13]
George Cleveland
饰：Professor Hensley
Muriel Goodspeed
饰：Zona [Ch. 4]
John Bagni
饰：Hawkman throne room guard [Chs. 5-9] (uncredited)
卡罗尔·伯兰德
Carroll Borland
饰：Woman in Ming's Palace (uncredited)
Howard Christie
饰：Minor Role (uncredited)
雷·科里根
Ray Corrigan
饰：Orangopoid [Ch. 8] (uncredited)
Jerry Frank
饰：Sharkman [Chs. 3-4] (uncredited)
Saul A. Goodkind
饰：Various Characters (uncredited)
Olive Hatch
饰：Aura's handmaiden [Ch. 10] (uncredited)
Charles McMurphy
饰：Atom Furnace slavedriver [Chs. 5-9] (uncredited)
蒙特·蒙塔古
Monte Montague
饰：Ming soldier [Chs. 12-13] (uncredited)
Bull Montana
饰：Monkey man [Ch. 1] (uncredited)
Lon Poff
饰：High priest #1 [Chs. 1-3] (uncredited)
Sana Rayya
饰：Priestess of the Tigron [Chs. 11-12] (uncredited)
Fred Scott
饰：Soldier with drugged wine [Ch. 9] (uncredited)
邦尼·瓦特斯
Bunny Waters
饰：Sharkman [Chs. 3-4] (uncredited)
斯利姆·惠特克
Slim Whitaker
饰：Prison guard (uncredited)