Goofs

The distance to Venus is claimed to be "millions of lightyears." The actual distance to Venus is about three light minutes.

The wheel covers on the crashed Cadillac have neatly positioned themselves at a nice camera angle leaning against the car. In a real accident if they had come off they would have gone rolling way down the road.

In the dark, the front end of a British police car is seen, with a lit "POLICE" sign on the roof over the windshield, four headlights (two large lights atop the fenders and two smaller lights just above the front bumper), and a narrow radiator grill. By the time the police car stops, it has changed into an American four-door sedan with only two headlights, a wide chrome radiator grill, and the steering wheel on the driver's left, and has been driving on the right side of the road (the wrong side to drive on in England).

While telephoning, Arthur Walker asks an operator to connect him with the "Ministry of War." At the time of the film (1954), the British government department in question would have been referred to as either the "War Office" or the "War Department." These titles would be used until 1964, when the War Office, the Admiralty, and the Air Ministry were merged into the Ministry of Defence.

Dr. Meinard notes that Susan's wounds are almost completely healed, as if from an accident that occurred weeks earlier, but but doesn't comment on the fact that the wounds all correspond to holes in the clothing that she is currently wearing.

Dr Meinard only examines Susan's arm which is bare due to the fact that her dress is sleeveless so there are no holes in her clothing over any wounds on which to comment.

In the opening sequence, Susan is driving straight down a straight road yet she is turning the steering wheel erratically from side to side. That kind of motion would cause the car to swerve violently from side to side across the road, throwing Susan around inside.

Susan is thrown to the right during the accident but the windshield shows damage to the left of the steering wheel such as a head would make from impact.

Very odd version of Britain. Looks like Britain and the people sound British. But the police uniforms are not British and when Derek Bond phones his superior, the superior says he was on the phone to 'our President' not the Prime Minister.

When the Chief of Police arrives to meet the stranger the shadow of the boom mic is clearly visible on the far wall.

Dr. Meinard states that for a Venusian breathing our atmosphere would be like us breathing under water, but it was well known in the 1950's that Venus' atmosphere was much denser than ours, so he has it backward (not that any of the exchange about respiration and atmospheres makes sense).

When the telepathic alien meets Susan by the lake, he asks if she would rather be alone. He should already know.