Revealing mistake: When Tom Cruise and Bill Nighy go to see Tom Wilkinson for the first time there are 2 reverse shots from behind Tom and Bill - if you look you can see Tom's hand is still there - it has been digitally removed in all other shots.
Valkyrie (2008)
1 revealing mistake - chronological order
Directed by: Bryan Singer
Starring: Tom Cruise, Bill Nighy, Kenneth Branagh, Tom Wilkinson, Terence Stamp, Carice van Houten
Factual error: Somewhere in the middle of the film a close-up of a map of Europe is shown. Obviously, it is a map made after 1945. The borders of Rumania, Hungary and Slovakia show this.
Henning von Tresckow: You scared me half to death.
Col. Claus von Stauffenberg: You'll be closer than that before we're finished.
More trivia for Valkyrie
Question: Why did all of the officers and high-ranking officials put out their cigarettes when Hitler's plane landed at the airfield?
Answer: They are supposed to stand at attention when he arrives and salute when he walks past them. It is considered bad form to salute the Führer (or any leader) with a cigarette in your mouth or hand.
Answer: Hitler was fanatically anti-tobacco: https://www.theatlantic.com/health/archive/2014/07/the-nazis-forgotten-anti-smoking-campaign/373766/.
Brian Katcher