Other mistake: It is night-time when Dr. Tart (Conway) releases the 2nd dove out the window. Moments later we hear 2 gunshots and a plop sound of a dead bird. Which would be impossible as the shooter could not see a gray bird in the night sky.
The Private Eyes (1980)
1 other mistake
Directed by: Lang Elliott
Starring: Don Knotts, Tim Conway, Bernard Fox, Trisha Noble
Continuity mistake: In the scene where the work crew is getting introduced (after the inspectors fall down the chimney) Hilda the maid already has Tim Conway's business card in her bosom before he gives it to her.
Mr. Uwatsum: How about a nice bowl of fish eyes?
Inspector Winship: Will you pardon me, please?
Mr. Uwatsum: Ah... Do you like hummingbird cookies?
Dr. Tart: ...No, thank you.