 Principal photography on "Death in the Air" under the working title of "Pilot X" began June 25, 1936.A series of name changes took place with an affidavit filed on March 10, 1938 with the New York State censors to change the title to "Pilot X" (the title of the print viewed).On May 13, 1943, the production was re-titled and reissued as "Mysterious Bombardier".