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, O Fantástico Homem Transparente (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 O Palpite de Mister Moto (1938) and Testemunha Ocular (1941)) and "LIMITED FARM BILL FAVORED" (e.g., also used in A Noiva do Monstro (1955), Os Desgraçados não Choram (1950), and O Monstro do Mar (1953)).