Goofs

When Simon and Linnet are climbing up the pyramid there's a shot of them having climbed more than half way up, but in the next shot, looking down on them, the ground and rubble is visible only a few meters beneath.

When Dr. Bessner is treating Simon Boyle for the gunshot wound; the bloody stained cloths tied around his ankles change orientation. When they first lay him down on the bed the section of the cloths with the blood stains is over just the left ankle. However in the next cut the bloody stains are over both ankles.

When Doyle recovering in bed the first time, the trailing switch of his bed light moves between his pillow and the bedside table between shots.

When Poirot is talking to Van Schuyler on the upper deck, at one point his left index finger is resting on his lips. However in the next immediate cut, it is withdrawn back into the fist.

When Linnet and Simon fall to the floor after the attack in the ruins, her face is dusty as they start to get to their feet. When they fully stand after the shot change, it's clean again.

Doctor Bessner identifies the statue on the left of the temple of Abu Simbel as "the singer". He says it's making a howling sound every evening. Both facts are wrong, "the singer" is one of the statues in Thebe West near Luxor of the now destroyed temple of Amenophis III, and it is said that it was "singing" only in the morning hours.

In a Closeup shot of Simon and Linnet standing on top of the Khufu Pyramid, the neighbored Pyramid of Pharao Khafre can be seen in the background. It appears to be even higher than Khufu's building, which is not the case.

When Jackie steals Dr Bessner's scalpel, she leaves the case and the drawer open. She then rushes out. With Simon immobile, nobody would cover her tracks and Dr Bessner would have immediately discovered the scalpel to be missing upon his return to his cabin. However, this scene is only an illustration to Poirot's narration, not actual events, which were not shown.

When Simon is recuperating in Dr. Bessner's cabin, Louise Bourget enters and Poirot questions her partly in French and partly in English. At one point Poirot says something that alarms Louise and she responds in French with "Ah non!" to which Poirot responds with the contradiction "Ah oui!" No native French speaker would say that. He would say "Ah si!" because in French "yes" in a contradiction is always expressed with "si" instead of "oui." Ustinov was an excellent speaker of several languages, including French, so it's surprising that he did not correct the script writer on that subject, but he probably knew that the contradictive yes, 'Si', is not used by Belgians. Poirot is famously Belgian, not French.

Reflections can be seen in the protective glass screen when the cobra is readying itself to strike Hercule Poirot in his cabin.

When Poirot is wandering round Linnet's bed after she had been killed, she is breathing.

In a split-second before being shot, Mrs Otterbourne already has a bloody spot on her forehead.

In the possible scenario of Dr. Bessner shooting the sleeping Linnet as described by Poirot; right before Bessner shoots, she blinks her right eye.

Obvious stunt double in the moments leading up to the stone nearly crushing the couple.

The page Linnet locates in Mrs Otterbourne's copy of her book "Passion under the Persimmon Tree" looks curiously blank/masked on the lower left hand-page, making it appear a predetermined place for Lois Chiles to find the "nymphomaniac baboon" quote.

In the opening scene, a Rolls-Royce is seen approaching the estate. When it gets to the gate, the driver honks the horn. But instead of hearing a 1920's era Rolls-Royce horn, the sound of a modern day automobile is heard.

When Poirot and Colonel Race are having dinner while Louise Bourget is being murdered, the musicians are playing Arabic instruments but the music played is Western, featuring a clarinet and violin.

In the dining room, the night Poirot is served eel instead of mushrooms, a group of Egyptian musicians is playing instruments like the suz and rebec. On the soundtrack is a palm court orchestra.

At the beginning, while Linnet and Jackie are in Linnet's master bedroom, a crew member crawling across the floor is reflected in the mirror.

In the opening scene where Linnet and Jacqueline are talking to each other in the upstairs bedroom, a piece of equipment (possibly the boom) is seen moving, reflected in one of the large mirrors.

A earlier comment stated a microphone cord is visible across Peter Ustinov's chest during his entire final monologue. It is a cord attached to his glasses, kept in his pocket.

After Linnet Ridgeway is almost crushed by a stone falling down from the temple of Karnak in Luxor, Dr. Bessner advises her to go back to the boat to have a rest. She replies that she must see the temple of Abu Simbel in the evening. In the next scene, she is visiting Abu Simbel with Simon, and in the late evening they are back on the Nile steamer. The problem is that the distance between the temple of Karnak and the temple of Abu Simbel is about 250 miles. The movie is set in the 1930s, when air travel was still primitive, so it's unlikely they flew down there and back in an afternoon. It is definitely impossible for a steamer to travel that distance in one afternoon.

In a short scene at the temple in Karnak, the entrance to the Cheops pyramid (in Cairo) is seen.

Dr. Bessner greets Linnet as "Meine Frau." In German, the appropriate style is "Gnädige Frau." "Meine Frau" would mean Linnet was his wife.