Sir Christopher Lee has said about this movie: "Some of the films I've been in I regret making. I got conned into making these pictures in almost every case by people who lied to me. Some years ago, I got a call from my producers saying that they were sending me a script and that five very distinguished American actors were also going to be in the film. Actors like José Ferrer, Dean Jagger, and John Carradine. So I thought "Well, that's all right by me". But it turned out it was a complete lie. Appropriately, the film was called End Of The World."
For no apparent reason, French distributors cut the movie down to one hour and fifteen minutes for its French theatrical release, Sir Christopher Lee only appearing in its prologue and its conclusion.
Director John Hayes was hired by Producer Charles Band after he served as Sound Recordist on Crash (1976).
End of the World was filmed in 1976 and features a scene where the STS (Space Shuttle) is seen. STS-1, the first launch occurred on April 12, 1981. The footage was rumored to be from the Rockwell plant where a space shuttle was under construction in Palmdale, California. However, this is not true as the security of the shuttle construction would make this impossible.
However, Rockwell did build a shuttle mock-up in 1972 and it was on public display at their facility during the production of this movie. The mockup is now permanently located at the Columbia Memorial Space Center in Downey, California.