Frost is arrested and committed for murder after he is apprehended burying his victims in the garden. However, even while under psychiatric care and tight hospital security, it becomes obvious that Mr. Frost is not all he seems to be.

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.

A rich actress who has gotten too old for leading roles employs a scientist who is working on a formula for eternal youth. The formula involves withdrawing certain fluids from the human brain. She takes the serum, but its unforeseen side effects turn her into a murderous monster.

Jon Porter comes home for a funeral and walks straight back into hell. The demons who butchered his sister are back, nastier than ever, and now they want his daughter, body and soul.

A group of space renegades hook up with a drifter named McQueen. Together they hole up in an abandoned research facility for the night and are relentlessly pursued by a human/monster hybrid.