Jason Goes to Hell: The Final Friday

There was allegedly a comic book that bridged the gap between Friday the 13th Part VIII: Jason Takes Manhattan (1989) and this film. It followed Jason after he was dipped in toxic waste in a New York City sewer, walked his way back to Crystal Lake. It also explains why the FBI has a task force specifically for Jason.

(at around 1h 18 mins) In the film, just before he handcuffs himself to Jason and a part of immovable furniture, Creighton Duke says "Son of a Bitch, you remember me?". In the final film, this sounds nonsensical. In the audio commentary on the DVD and Blu-ray, it is revealed that the script at one point had it that Jason killed Duke's girlfriend. His backstory initially explained that he was canoeing with his girlfriend in Camp Crystal Lake before Jason emerged from the water and dragged his girlfriend down into the lake. This is what led to his career in the police force, dedicating his life to hunting down Jason for revenge. This was ultimately cut from the film.

The jungle gym in front of the Voorhees house was also used in The Birds (1963).

Kane Hodder, who portrays Jason, was severely burned over much of his body during a stunt gone wrong some years prior to this movie and, as a result, the skin below his neck is somewhat discolored and disfigured. One day after filming, he was peeling the Jason costume and make-up off his body when the young child of a crew member (who was brought to the set to see what it was like to make a film) became frightened of his burnt skin. Hodder calmly and sweetly picked up and hugged the child and told him that his body "just looked a bit different" and that there was nothing to be afraid of. Hodder let the child touch the skin on his arm to see that it didn't hurt him; the child immediately calmed down and had a fun time talking to Hodder. It was seeing this and later hearing that Hodder spent much of his free time at children's hospitals that made director Adam Marcus realize that, despite often playing violent or evil characters, "Hodder had a heart of gold".

The reason that this film is titled "Jason Goes to Hell: The Final Friday" instead of "Friday the 13th Part IX" or something similar is that New Line Cinema did not have the rights to the name "Friday the 13th".