Trivia: Many shots of Connery & Ford are from the waist up, which is probably a good thing, as to cool themselves from the heat while on location in Spain, they shot the scenes wearing no pants.
Trivia: Michael Sheard makes an uncredited appearance as Adolf Hitler. Sheard played Admiral Ozzel in The Empire Strikes Back, which also featured Harrison Ford and Julian Glover. The film also features an uncredited appearance by Nick Gillard, who choreographed the lightsaber duels in the Star Wars prequels. All Lucasarts productions.
Trivia: During the motorbike chase Harrison Ford's hair is longer and Sean Connery's beard is fuller. This is because this scene was filmed after principal photography had ended, but Spielberg felt a chase scene was needed to explain their escape from the castle. The shot of Connery against a blue sky when the tank goes over the cliff was also filmed later, which again is why his beard is fuller.
Trivia: George Lucas originally wanted to set portions of the film in a haunted mansion where Indy would encounter various ghosts and specters, but director Steven Spielberg protested, as he had made "Poltergeist" a few years earlier and didn't want to repeat the same scares and imagery over again in an Indiana Jones film. Other early ideas had Indy searching for the fountain of youth and encountering the Chinese mythological figure the Monkey King.
Trivia: The little girl who approaches Adolf Hitler at the rally is the daughter of stuntman Vic Armstrong and his wife, Wendy Leech.
Trivia: When a Nazi kills a soldier by throwing a grenade at him during the desert scene, a "Wilhelm scream" can be heard.
Trivia: It's third time lucky for British actor Michael Sheard who pops up as Hitler. He was originally considered for the Gestapo officer Toht in Raiders of the Lost Ark but lost to Ronald Lacey. He shot some scenes as the captain of the U-boat which captures the Ark but due to rough seas causing camera stability problems, the shots were never used. He also played Hitler a few years earlier in the Uk sci-fi series The Tomorrow People.
Trivia: The tank chase sequence took ten days to film.