Rock Hudson as Michael Martin, aka "Lightfoot"[2] Barbara Rush as Aga Doherty Jeff Morrow as John Doherty, aka "Capt. Thunderbolt" Kathleen Ryan as Lady Anne More Finlay Currie as Callahan Denis O'Dea as Regis Donnell Geoffrey Toone as Captain Hood Hilton Edwards as Lord Glen Sheila Brennan as Waitress Harry Goldblatt as Brady Charles B. Fitzsimons as Dan Shanley Christopher Casson as Lord Clonmell Philip O'Flynn as Trim Pedro Armendáriz: Cadmos Giuliano Gemma: Crios Antonella Lualdi: Ermione Jacqueline Sassard: Antiope Serge Nubret: Rator Gérard Séty: Achilles Tanya Lopert: Licina Ingrid Schoeller: Emerate Franco Lantieri: Tarete Isarco Ravaioli: Centinela Fernando Rey: High Priest