* NoBudget: Only $200,000 was spent for this film, which is pretty amazing considering that it made ''$35,000,000''.
* DawsonCasting: All of the teenagers are played by actors in their late twenties/early thirties. Even the least severe example--17/18-year old Laurie played by then-20 year old Jamie Lee Curtis.
* PlayingAgainstType: Creator/DonaldPleasance had been primarily playing villains (most famously [[Film/YouOnlyLiveTwice Ernst Stavro Blofeld]]) up until this point.
* {{Recut}}: During the filming of the sequel, John Carpenter shot more scenes for the ABC broadcast of the film to help it pad out the allotted time. While largely just character exposition, one scene ([[spoiler:a visit to Michael's asylum room where the word "sister" is carved in the door]]) serves to help validate the twist of the second movie.
* StarMakingRole: Creator/JamieLeeCurtis.
* WhatCouldHaveBeen:
** Creator/ChristopherLee turned down the role of Dr. Loomis and later said it was the biggest mistake he ever made in his career.
** Also, Creator/PeterCushing was the first choice to play Dr. Loomis, but [[Film/ANewHope since he'd recently appeared in ''another'' little independent film]], his asking price went higher than the studio was willing to pay.
** Bill Paxton was offered the role of Bob (Lynda's boyfriend) since he was dating P.J. Soles at the time, but had to turn it down due to work on another movie.
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