In a 16th century kingdom in the Netherlands, the newly crowned King Stephan concludes a secret treaty with the Spanish. This puts him at odds with his younger brother, Prince Roland, who favors a treaty with the French. Stephan orders Roland imprisoned but Roland escapes and leads a revolt.
| Actor | Role |
|---|---|
 John DerekPrince Roland | Prince Roland |
 Barbara RushCountess Nita Orde | Countess Nita Orde |
 Carla BalendaPrincess Maria | Princess Maria |
 Whitfield ConnorKing Stephan | King Stephan |
 Edgar BarrierCount Blanco | Count Blanco |
 Robert ShaynePrime Minister Treeg | Prime Minister Treeg |
 Harry LauterJan | Jan |
 Don C. HarveyKoepke (as Don Harvey) | Koepke (as Don Harvey) |
 Henry RowlandGreb | Greb |
 Britt LomondBrenner (as Glase Lohman) | Brenner (as Glase Lohman) |
 Gene RothCaptain Brock | Captain Brock |
| BBob PeoplesCarl | Carl |
 Sandy SandersMeyers | Meyers |
 Joe McGuinnGeneral DuBois (as Joseph F. McGuinn) | General DuBois (as Joseph F. McGuinn) |
| AAl CantorLund | Lund |
 Edward ColmansSpanish Admiral | Spanish Admiral |
 Stanley BlystoneCaptain Brock's First Mate (uncredited) | Captain Brock's First Mate (uncredited) |
 Jimmy DimePirate (uncredited) | Pirate (uncredited) |
| EEddie FosterSailor (uncredited) | Sailor (uncredited) |
 John HartCaptain of the Guards (uncredited) | Captain of the Guards (uncredited) |