Corrected entry: When Schaffer is creeping up behind the German radio operator in the castle in an attempt to stab him with the knife he's holding, his boot squeeks which in turn alerts the operator to his presence, resulting in him pushing the alarm button. Schaffer then shoots him with a pistol attached with a silencer. Rather than risk being heard, why didn't Schaffer shoot the operator as soon as he entered the room? No-one would have heard the shot because of the silencer.
Corrected entry: The SS colonel is talking to Maria about Düsseldorf and about which side of "ze zquare" the cathedral is located. There is no cathedral in Düsseldorf.
Corrected entry: Not only was Crete still occupied by the Germans when the movie takes place but General Carnaby can't have been going there or anywhere else for 'the rendezvous with the Russians' because the Allies never shared any information about the D-Day landings with the Russians for security reasons.
Corrected entry: In order to get the two stars of the film (Richard Burton and Clint Eastwood) to sign up, the film's producers had to use a little trickery. They told Burton that Eastwood had already signed up and told Eastwood that Burton had already signed up, when in fact neither of them had yet. The plan worked however, because Eastwood was keen to work with Burton, the classy British stage actor, and Burton wanted to work with Eastwood, the big Hollywood action star. Had one of them turned the role down however, the producers would have lost both the leading actors.
Corrected entry: When the heroes have jumped off the cable car into the water, they climb out and run for cover. As they are running they pass a large window and you can clearly see the camera crew reflected in it.
Corrected entry: Just before they all jump out of the cable car, Smith takes two lit light bulbs out of the ceiling of the cable car with his bare hands. In real life, his hands would have been burned