A $500,000 building was erected in Berlin to be blown up during an action scene. No cameras were rolling when it did so.
Many of the Nazi S.S. men in the movie were U.S. soldiers from the Berlin Brigade.
After Franze "hires" to be nanny to his children, she delivers a voice-over explaining the fortunate circumstances, into which she had stumbled, including mentioning that he frequently entertained guests including Himmler and Von Stauffenberg. Von Stauffenberg is the officer played by Tom Cruise in Valkyrie (2008).
Liam Neeson once on the Graham Norton show revealed that he swung Melanie Griffith's daughter Dakota Johnson round and round and played with her on the sets of SHINING THROUGH.
The film cast includes two Oscar winners: Michael Douglas and John Gielgud; and two Oscar nominees: Liam Neeson and Melanie Griffith.