Trivia: Michael Myers' mask is a Captain Kirk mask painted white with ruffled hair and a few other tweaks.
Trivia: While the two men are preparing for the raiders towards the film's end (as they lower the gates, etc.), the music playing is the same as that which accompanied the opening credits of "Monty Python and the Holy Grail."
Trivia: Two of Bruce Lee's earlier films, The Way of the Dragon and Fist of Fury, are seen as films Billy Lo (Bruce Lee) is starring in, Fist of Fury being the one where Billy is shot.
Trivia: Originally, Damien was going to be 15 instead of 12. He would also have had a girlfriend, so that when he discovered that he was the Antichrist, he would be torn between love and destiny. This idea was ultimately scrapped.
Trivia: The cast were told they could not have their own dressing rooms so Angela Lansbury, Maggie Smith and Bette Davis all shared a room.
Trivia: Though Phil Silvers is shown prominently in the credits, he has only about 2-3 seconds of screen time at the end of the movie. Silvers suffered a stroke in the early 70's; "The Cheap Detective" was made in 1978. His speech had become slurred and likely affected his performance abilities.
Trivia: In the opening title sequence we see a garbage truck going through the Golden Gate Bridge toll booth. We would find out later that these trucks were used to transport the pods. The truck is traveling southbound from Marin County into San Francisco which is appropriate, (intentional or not) since the book Body Snatcher was set in Mill Valley, in Marin County, about 10 miles from the bridge.
Trivia: In this film Gregory Peck is attacked by large vicious dogs, dogs that can be trained to attack and kill; and in the film "The Omen", again Gregory Peck is attacked by very (or the same) vicious dogs.