This film has a famous comedy scene with Laurel and Hardy trying to move a piano across a bridge suspended high above some mountains. Originally, there was to have been a subplot in which a bomb had been secretly attached to some keys in the piano, thus adding suspense to the comedy. Producer Hal Roach deleted the bomb subplot, but retained the now-pointless shots of Laurel accidentally hitting the piano keys.
The gorilla is played by actor Charles Gemora, who also played Ethel the Chimp in the earlier L&H short The Chimp (1932).
Although it has been frequently claimed that Stan Laurel talked Anita Garvin into coming out of retirement to play the wife who is interested in seeing Stan And Ollie's mousetraps, truth of the matter is, Garvin was hardly retired: she appeared in a dozen different films, both features and shorts, between 1936 and 1940, including this one. Curiously, this same claim is also frequently attributed to her appearance in A Chump at Oxford (1940), filmed in 1939.
With a budget of $700,000, "Swiss Miss" was the most expensive Laurel & Hardy feature ever produced. The team's 1940s films for 20th Century-Fox and MGM - major studios with much deeper pockets than their previous employer, Hal Roach - were turned out as B pictures for considerably less money.
Rumoured to have been filmed in Colour, but the film was processed into Black and White. Close examination of the Black and White film quality compared to similar Laurel and Hardy features of that time possibly suggest this, but so far a colour print has not surfaced. The film was ideal for colour testing due to the sets costumes and even the title lettering used.