The limpet UFO is shown hiding behind the S-IVB third stage of Apollo 8 still in Earth orbit in 1981, when the episode is set. However, all of the Moon-bound Apollo S-IVB stages boosted the spacecraft out of Earth orbit towards the Moon which then placed them into a Heliocentric orbit. Thus, Apollo 8's S-IVB-503N has been in orbit around the Sun since December 22, 1968.
Soviet space junk Vostok 2 was said to be launched in 1965, it was actually launched in 1961.
An instrument panel in the lunar module has the heading "Computor Display" rather than "Computer Display".
While "computer" is the accepted modern spelling, "computor" was utilized to describe computer hardware before and after the 1960's when the programme was created.
While "computer" is the accepted modern spelling, "computor" was utilized to describe computer hardware before and after the 1960's when the programme was created.
When Foster re-enters Earth's atmosphere, his face gets distorted by the high gravitational forces. His hair on his right side however moves in the stream of the wind jet used to simulate the facial distortion.
When Lunar Module 32 is lifting of, she is standing on her tail like a conventional rocket. However, the cockpit scenes show the pilots sitting upright when they should be on their backs with their legs up.
When Straker and Foster are driving from Henderson's office back to the Harlington-Straker studio, Straker is driving on the left, even though in the Century 21 universe right-hand driving is the norm (and the car is left-hand drive).