Goofs

(at around 54 mins) When Milo Perrier is in the kitchen inspecting the dead body of the butler with Jessica Marbles and Inspector Wang, he discovers a note in the butler's hand. When he removes it, it gets ripped. In the next shot with the note, it is no longer ripped.

(at around one hr four mins) Sam Diamond extends his arm and points at Jessica Marbles at the dinner table when she deduces there are "two dining rooms." In the next shot, he is pointing with his opposite hand.

(at around eight mins) When Inspector Milo Perrier is being driven to the home of Lionel Twain, the candy bar he is eating changes size inconsistently between shots.

In the early kitchen scenes, the bread in the box on the kitchen table is pointing in the direction of the stove/back door. After the butler has been discovered dead, the bread points in the opposite direction. As the three detectives exit, the bread stands straight up.

When Milo hands the key from the dining room to Mr. Wang, the discontinuity between that shot and the next one is obvious.

(at around 1h 19 mins) When the "deadly snake" is placed in Wang's bedroom, a loud hissing and a rattlesnake's rattle can be heard. Later, when Wang and son confront Bensonmum, they present a constrictor.

(at around six mins) When the screws in the door hinge are loosened, they make the door creak, In reality, doing so would only make the door not close properly.

(at around 52 mins) When Milo Perrier, Sidney Wang, and Jessica Marbles find the dead butler, Wang feels the wrist for a pulse and declares him dead. However, he did not allow even two seconds when feeling for a pulse; this is too short a time to determine if a pulse exists or not.

Lionel Twain offers a challenge to the detectives to solve the murder-to-be-committed, with a prize of 1 million dollars in cash. He then slaps down two bundles of wrapped banknotes. Assuming there to be 100 notes in each bundle - based on their appearance - they would have to be $5,000 notes. However these were officially discontinued in 1969, though they had effectively disappeared long before then. If each bundle had 50 notes, making a total of 100, then they would be $10,000 notes and exactly the same applies.

(at around 38 mins) In several scenes, after he has dressed for dinner, Sam Diamond has what appears to be a large black fly on the back of his dinner jacket. This is actually a bullet hole. Dora Charleston mentions it when she first sees the hole. Sam replies "You should see the other guy." The issue isn't brought up for the rest of the film.

The kitchen is in keeping with the period except for the double-door refrigerator/freezer with an ice-dispenser, first introduced in 1965. The Coke bottles seem modern. At that time "Coca-Cola," not "Coke" would have appeared on the bottles, more likely embossed than printed, and probably in a green bottle.

However, it is never stated that the movie actually takes place in the 30-40s. For instance, obvious 1970 era stamps are shown.

(at around 1h 22 mins) When Perrier sees his driver in the bed, he tells him to go and sleep in the car, seemingly forgetting that the house is locked down and no one can get out until morning.

However, both characters are overwhelmed by the murder and, of course, this is played for fun.

Perrier constantly talks of the danger of fingerprints contaminating the scene. Yet, when he removes the paper from the dead butler, he initially uses a handkerchief, then opens it barehanded, which would have left his own fingerprints.

However, Perrier is a spoof of a detective and this is all played for laughs.

Wong's obvious fake front teeth (not to mention a horrible rendering of "Asian eyes" which could not be tolerated nowadays). This may have been an intentional jab at white actors being cast, and not convincingly, in non-white roles.

When Charleston picks up the mouse in his room, it's clear that it is a fake (Also, mice don't make the noise that is heard).

How do Miss Marbles and Miss Withers get into the house? It's already been established that the Fay Wray-scream doorbell can be heard pretty much anywhere in the house, but it isn't heard before Miss Marbles and Miss Withers make their entrance.

When Miss Marbles is in bed and says, "Good heavens!" her mouth doesn't move.

(at around 1h 30 mins) The maniacal laughter just before the credit rolls does not match the mouth of the laugher.

At one point, Monsieur Perrier is separated from the others by a locked door. Sam Diamond solves the problem by shooting out the lock. However, later, when he and Miss Skeffington are locked in their bedroom, it doesn't occur to Diamond to free them using the same method.

(at around 1h 14 mins) Milo Perrier tells Sam Diamond, "I'm not a Frenchy... I'm a Belgie," referring to the fact he is from Belgium and not France. However, in discussing Twain's annual poodle hunt in France, he implies that's his home country, and later he says, referring to himself, that you should "never underestimate a Frenchman's nostrils."

During the "everyone accuses everyone else" scene, no one points out that there are only three possible suspects among the ten: Sam Diamond, Dick Charleston, and Milo Perrier. None of the associates leave the dining room, and Sidney Wang and Jessica Marbles are together the entire time they leave it.

At one point in the dining room, Milo Perrier is referred to as Marcel Perrier; Marcel is Milo Perrier's chauffeur.