The introduction sequence that started every episode through the Cryptkeeper's home is actually the size of a miniature golf course green. Small "snorkel" cameras were used to film this portion. The descent into the crypt in the end of the intro is computer generated.
The series was originally envisioned as a trilogy story feature film. This was changed to a television program because the producers feared it would bomb as a movie, as trilogy-style horror films rarely had success at the box office.
While animatronics expert/puppetmaster Kevin Yagher was in the final stages of designing the Cryptkeeper, he tried on a few noses to see which would look best for the character - who had already shed lips, hair and most of his teeth - but none looked quite right. Director and producer Robert Zemeckis simply remarked, "You know, you don't necessarily have to have a nose."
William Sadler (credited as Bill Sadler), who plays an executioner and the titular character in the very first episode titled "The Man Who Was Death", would go on to play the Grim Reaper two years later in Bill & Ted's Bogus Journey (1991)