The cricket match that is being talked about in the movie by Charters (Basil RadfordBasil Radford) is the description of the actual third Ashes test between England and Australia at Manchester in 1938. The result of the test match quite rightly was shown in the end through a newspaper headline - "Match abandoned due to rain".
A musician is mysteriously strangled by disembodied hands after serenading Miss Froy under her hotel window. This is not one of the film's loose ends as previously reported. Froy uses a musical code and the singer can be assumed to be passing information to Froy. Note that Froy is carefully listening to the notes, not just enjoying the serenade. The singer is an informant or another spy.
Although he uses the fictitious Bandrikan language when speaking to his staff, at the end of the phone conversation in which he conveys Iris's room service order for "champagne", Boris, the harassed hotel manager, exclaims, "Oy vey is mir", a Yiddish expression meaning "woe is me."
Orson WellesOrson Welles reportedly saw this film eleven times.
The set that the movie was shot on was only ninety feet long.
Charters and Caldicott (played by Basil RadfordBasil Radford and Naunton WayneNaunton Wayne) proved to be such popular characters that they were teamed up in other films. They reappeared in Night Train to Munich (also starring Margaret LockwoodMargaret Lockwood) and Millions Like Us, two films also written by Sidney GilliatSidney Gilliat and Frank LaunderFrank Launder. They also starred in the BBC Radio serials [Crook's Tour] (which was also made into a film), and [Secret Mission 609]. In 1985, they reappeared in the BBC Television mystery mini-series, Charters & Caldicott, played by [?] Robin Bailey and [?] Michael Aldridge.