This likable comedy has a good excuse for failing to reach its audience at the time: it was released the night before the attack on Pearl Harbor and played during a week when nervous Americans stayed home to listen to news on the radio.
Marguerite Chapman went on to appear in another film with an invisible protagonist, The Amazing Transparent Man (1960).
Willie Best has the most screen time of anyone in this film (more than Edward Everett Horton), but due to his race, he is billed at the very bottom of the opening credits and eighth in the end titles.
The Daily Express newspaper announcing the disappearance of Professor Shotesbury has at least two story headlines that frequently appear in other movies' newspapers: "3 NAMED TO FIX LIABILITY COSTS" (e.g., also used in Mr. Moto's Gamble (1938) and Sleepers West (1941)) and "LIMITED FARM BILL FAVORED" (e.g., also used in Bride of the Monster (1955), The Damned Don't Cry (1950), and The Beast from 20,000 Fathoms (1953)).