This precise film wasn't selected when the final draft script of "Impulse" was issued. As a result, that script referred to the film as "a TBD noir-style movie" and the teleplay further noted, "This will be nondescript, black & white footage from the 1940's." The footage to be used in the episode was also referred to as "a TBD scene". On the other hand, dialogue spoken by three ENT main characters while the film was being shown in Enterprise's mess hall, ostensibly regarding the movie, was written at that point. Consequently, the lines they have about the film don't actually apply to Appointment with Danger at all.