The distance to Venus is claimed to be "millions of lightyears." The actual distance to Venus is about three light minutes.
Although the movie is set in Britain, Susan North drives an American Cadillac with the steering wheel on the driver's left, on the left side of the road (the correct side to drive on in England).
A short time later, 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).
A short time later, 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).
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.
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.
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.
When the telepathic alien meets Susan by the lake, he asks if she would rather be alone. He should already know.
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).
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.