Information from IMDb
Plot Summary
In a movie set in the beautiful country of Portugal,
Gentlemen crooks, have a battle of wits and morals,
with high stakes!
Written by ethanedwards
Full Cast
Ray Milland .... Capt. Robert John Evans
Maureen O'Hara .... Sylvia Merrill
Claude Rains .... Aristides Mavros
Yvonne Furneaux .... Maria Maddalena Masanet
Francis Lederer .... Seraphim
Percy Marmont .... Lloyd Merrill
Jay Novello .... Insp. Joao Casimiro Fonseca
Edward Chapman .... Edgar Selwyn
Harold Jamieson .... Philip Norworth
Humberto Madeira .... Tio Rabio
Duarte de Almeida .... Extra with a 16-year film gap (uncredited)
Writing Credits
John Tucker Battle screenplay
Martin Rackin story
Trivia
Nelson Riddle's instrumental recording of "Lisbon Antigua" (an ancient Portuguese melody) was already on the Hit Charts before this film was made. Republic publicity sent out a story that "Director/Producer Ray Milland took a recording of the music with him and had a Portuguese orchestra adapt it for a sequence in the picture".
Filming Location
Lisbon, Portugal