"Academy Award Theater" broadcast a 30 minute radio adaptation of the movie on November 13, 1946 with Rex Harrison reprising his film role.
As noted in the opening caption, the action of the film takes place during the year preceding the Second World War (beginning with the Anschluss of Austria into the Third Reich in March 1938) and closes on the night of Sunday September 3rd 1939 (the day the United Kingdom declared war on Germany).
The banner on the city bus stating "BERLIN RAUCHT JUNO" (Berlin smokes Juno) is an advertisement for a cigarette brand later distributed to German soldiers.
The second of four cinematic appearances by Charters and Caldicott (played by Basil Radford and Naunton Wayne). They first appeared in The Lady Vanishes, also written by Sidney Gilliat and Frank Launder. They later appeared in Crook's Tour, and in Millions Like Us, which was also written by Gilliat and Lauder.
The very first scene is a fairly accurate depiction of the Berghof, Hitler's mountainside residence near Berchtesgaden and Obersalzberg in Bavaria. The home was famous for its huge picture window which overlooked mountain scenery and was often used to impress visiting foreign VIP visitors.
Until now (as of 2011), this film has not been released in Germany at all.