Henry Ainley

Character: Prince Olaf

Kathleen Vaughan

Character: Princess Monika

Harvey Braban

Character: King Hildred

Sam Wilkinson

Character: Prince Michael

Sidney Paxton

Character: Chief of State

John Wyndham

Character: Captain Karsburg

Laurence Forster

Character: General Erlenberg

Francis Duguid

Character: Captain Schway

Frank Woolfe

Character: Captain Hector