Doug McClure as Lt. Brian Fleming

Jill St. John as Mistress Jessica Stephens

Guy Stockwell as John Avery

Mary Ann Mobley as Princess Patna

Kurt Kasznar as Zucco

Richard Deacon as Swaine

Torin Thatcher as Captain Cullen

Diana Chesney as Molvina MacGregor

Ivor Barry as Cloudsly

William Glover as Captain Hornsby (as Bill Glover)

Woodrow Parfrey as Gow

Sean McClory as Sparkes

Michael St. Clair as Collins

Émile Genest as Captain Mission

Ted de Corsia as Capt. McTigue

Alex Montoya as Caraccioli

Tanya Lemani George as Member of Zucco's Troop (as Tanya Lemani)

Ami Luce as Member of Zucco's Troop

Bob Terhune as Member of Zucco's Troop (as Robert Terhune)

Chuck Couch as Member of Zucco's Troop

Bill Couch as Member of Zucco's Troop (as William J. Couch)

Loren Janes as Member of Zucco's Troop

Henry Monzello as Member of Zucco's Troop (as Hank Monzello)

William E. Snyder as Member of Zucco's Troop (as William Snyder)

Rodney Hoeltzel as Member of Zucco's Troop

Danny Rees as Member of Zucco's Troop