Carole Landis filmed Brass Monkey at Twickenham Studios in England during the Fall of 1947. It was not released in the United States until 1951 - three years after her death. Some people incorrectly believe that it was her last film but she actually filmed "Noose" during January and February 1948.
Carole Landis reportedly said that she encouraged the English actors to speak more slowly so that U.S. audiences could understand them.
William Worsley, credited as Variety Advisor, was the producer of the Carroll Levis radio shows, which also featured Avril Angers.
When Hutch does his solo spot on the piano, it seems to be so cold in the studio that his exhaled breath is visible.
In the reviews, there is not yet an explanation for the title 'Brass Monkey' and the use of brass monkeys in the plot. A common English expression, to describe cold weather, is that "it is cold enough to freeze the balls off a brass monkey". Hence the use of the term 'brass monkey' in the title would be enough to get an English audience sniggering at the implied rudeness. Many other British comedies have riffed on the same pun - for instance in Carry On Cleo ("more like the season of the brazen monkeys").