The code-name for the character of 'The Sender' (Zeljko Ivanek) was John Doe #83. He is never known by any personal name in the picture.
Screenwriter Thomas Baum based this horror movie's screenplay on his own real life experiences of growing up with a mother who was overly-protective and suffered from agoraphobia.
The favorite horror movie of director Quentin Tarantino for the year 1982 according to his audio-commentary for Hot Fuzz (2007). According to 'Tysto', ''he created his own video version from the R-rated and TV versions''.