- Enforced Method Acting: Taaffe O'Connell's screams were a result of how cold the KY jelly used for the slime was.
- Fatal Method Acting: Averted. Taaffe O'Connell was nearly crushed by the one-ton giant worm during the filming of the notorious rape scene.
- Follow the Leader: The film was heavily inspired by Alien.
- Old Shame: Actually averted, no one really seems to be that ashamed of working on it, not even Taaffe O'Connell, who played Daimeia.
- Prop Recycling: The uniforms were left over from the recently-cancelled Battlestar Galactica (1978).
- Wag the Director: Sid Haig didn't think the dialogue in the script matched the character of Quuhod, so he asked Roger Corman if he could play Quuhod as a near mute instead. Corman agreed, and let Haig portray Quuhod with almost no dialogue. Haig only says a single line in the whole movie.
- What Could Have Been:
- Working Title: Galaxy of Horror, Quest and Mindwarp: An Infinity of Terror.
Trivia / Galaxy of Terror