The Saint's Double Trouble is a 1940 action-adventure film produced by RKO Pictures. The film stars George Sanders as Simon Templar, a.k.a. "The Saint", a master criminal turned crime-fighter, and features horror film legend Bela Lugosi as "The Partner". This was the fourth of eight films in RKO's film series about the character created by Leslie Charteris, and the first film to not be directly based upon one of the original Saint books, although Charteris did contribute to developing the story for the film. In this production, Sanders plays a dual role, not only that of Templar but of his doppelgänger, Duke Bates. When Bates is spotted smuggling diamonds into the US, Templar is blamed for the crime. Co-starring in the film is Helene Whitney as love interest Anne Bitts, and Jonathan Hale as Insp. Henry Farnack. Plot summary An authentic mummy is packaged and shipped from Cairo to Professor Horatio Bitts in Philadelphia. The package is sent under the name Simon Templar, but the sender is a man called The Partner (Bela Lugosi), who is a member of an international team of jewel thieves, led by Boss Duke Bates. Meanwhile, John Bohlen of the Philadelphia Police Department is visited by Inspector Henry Fernack from New York. Bates himself, posing as Templar due to their uncanny resemblance, comes to visit Professor Bitts and gathers some of the smuggled diamonds. Later that night, the police are called to the professor's home to investigate a homicide committed by Bates as he left. Fernack and Bohlen arrive at the crime scene and suspect Simon Templar of the killing, since Bates planted one of Templar's calling cards on the dead body. Knowing he is a suspect, Templar has to stay away from the police, but he still visits Inspector Fernack at his hotel late at night. Fernack tells Templar that he personally doesn't suspect him. Templar goes back to the crime scene, talks to Anne, daughter of the professor and has a closer look at the mummy. Templar has no idea that Boss Duke Bates is his spitting image as yet. When Boss kills another man, one of his fences, Templar manages to find his hideout at the 4 Bells Café and finds out about his doppelganger. After Boss finds out that one of the jewel packages is still inside the mummy, he goes back to the professor's house, but the professor crosses his