Corrected entry: When Columbo has Galesko at the station, Galesko picks a camera off the shelf and opens up the back to show that the original negative is still in there (as proof of his innocence). But since none of them are in a dark room, opening the back of the camera would damage the negative, something Galesko should know since he's a professional photographer.
Factual error: Probably an in joke - the wheels of the "airliner" shown landing at LA international airport are those of a B52 bomber. They are very distinctive and look nothing like those on any airliner ever made.
Trivia: Columbo's first name is never mentioned throughout the series. However in a few episodes, such as "Dead Weight", "A Matter of Honor" and "Death Hits the Jackpot" he flashes his badge and the name "Frank" can clearly be seen.
Question: The examiner says he can't tell which blow hit the victim first. Columbo says he's lying on his back and says the blow to the forehead was first. Why did he think that? If the first blow hit him on the forehead and he fell on his back, how did he get the second blow on the back of his head while he was lying that way?
Correction: The film has already been developed and printed - Columbo has a huge blowup of the print. It cannot be further damaged by exposure to light. In fact the whole scene is nonsensical - there is no camera in the world which retains the film strip in the way shown here, and there is absolutely no reason for anyone to put the film back into the camera either - and no easy way of doing it. A professional photographer would know that.
The camera is an old Polaroïd of the 60s (model 800). The film used consists of two rolls : the positive one and the negative one. After taking a picture, the photo is extracted and the negative part may remain in the camera.