Mimi Craven, Wes Craven's wife at the time, cameos as Nurse Cooper. She also played a nurse in Craven's most well-known film, Nightmare - Mörderische Träume (1984).
Some copies of the film show the doctors in green scrubs during the surgery; others show them in blue scrubs.
The original VHS release of the film cuts out several minutes from the beginning, which details the cryogenic suspension process.
The building shown to be the location of the family company is also the same as shown in Barnaby Jones.