Trivia

The total production time - including script approval by Lorimar, casting, special effects, voice-overs, and exterior shots - was slightly over two weeks, making this one of the quickest made-for-TV movie turnarounds ever. This was due mainly to a writers strike that began just before the script was completed.

The idea of the creatures coming out of an ash clean-out pit came from the Spanish house that Nigel McKeand was living in at the time. This house had an old fireplace at the rear with a deep clean-out pit, bolted at the rear. With as creepy and dark as it was, nobody ever wanted the job of cleaning it out.

The role of Alex Farnham was originally to be played by George Hamilton.

Aired as an installment of ABC's The Wide World of Mystery (1973) on February 10, 1975.

Don't Be Afraid of the Dark (1973) has often been noted in film criticism for its Freudian themes, it's proto-feminist undertones, and the "fears and anxieties about the changing roles of women and the ways they are so often victimized or go unheard."