This low-budget thriller, boosted by Bela Lugosi, was one of the biggest successes for the poverty row Producers Releasing Corporation (PRC). After the war, the studio tried to recapture this success by producing an in-name-only sequel, Devil Bat's Daughter (1946), and a virtual shot-by-shot remake, The Flying Serpent (1946).

Because it was produced by the "poverty row" studio PRC, which failed to renew its copyright, the film is now a public domain title. This explains why it is frequently run on late-night TV, and is available on home video from multiple distributors, often of very poor quality.

The phrase Devil Bat is said 29 times in the movie.

This was the first, and most successful, horror film from Producers Releasing Corporation (PRC) after it was formed from the failed Producers Distrubuting Corporation (PDC). Filming began October 28 1940.

Due to its box-office success, the film was given both a 1945 re-release (double-billed with Man Made Monster (1941)) and an in-name-only sequel (Devil Bat's Daughter (1946)).

His role as editor Joe McGinty provided what is now the most famous credited on-screen role for Arthur Q. Bryan. If his voice sounds familiar, it s because he was the original voice of Elmer Fudd for Warner Bros.

This film received its first documented telecasts in New York City Wednesday 4 August 1948 on WCBS (Channel 2), in Albuquerque Saturday 20 August 1949 on KOB (Channel 4), in Chicago Wednesday 5 October 1949 on WGN (Channel 9), and in Los Angeles Thursday 23 March 1950 on KTLA (Channel 5).

There's quite an age difference between Dave O'Brien and Donald Kerr (reporter Johnny Layton and sidekick/photographer "One-Shot" Maguire). O'Brien was just 28 and Kerr was 49, although he sure doesn't look that old! Neither man was ever a big star although they always had plenty of work playing bit parts--and in Kerr's case, nearly always uncredited. Example: Kerr was in 29 movies in 1940 alone, all but 2 or 3 in uncredited bit parts. O'Brien is better known for his role in the whacky 1936 "Reefer Madness" but he did a nice job in the much more serious 1945 feature about a modest war hero "The Man Who Walked Alone. And Kerr is better known as silly Happy Hapgood, reporter, who accidentally accompanies Flash Gordon to Mars in a 1938 serial.

Dr. Carruthers ('Bela Lugosi') drives a 1939 Oldsmobile coupe. Henry Morton ('Guy Usher') drives a 1939 Buick coupe.

Note the use of electrical apparatus manufactured by Hollywood legend, Kenneth Strickfaden, in THE DEVIL BAT (1940), but first seen in FRANKENSTEIN (1931)