ट्रिविया

Barbara Crampton's character, Dr. Daniella Upton, wears a pair of large glasses throughout the movie. These are an intentional homage to Dr. Katherine McMichaels, Crampton's character in Stuart Gordon's From Beyond (1986).

This film is an adaptation of the 1933 short story "The Thing on the Doorstep" by H.P. Lovecraft.

Screenwriter Dennis Paoli previously adapted H.P. Lovecraft stories for the 1980s films "Re-Animator" and "From Beyond," which both starred Barbara Crampton.

Jeffrey Combs was considered to play a small part, but was unable to do so because of scheduling conflicts.

The morgue scene was shot in an actual morgue.