Attendees at a horror-film convention in San Francisco keep disappearing. It turns out that the guest of honor is a real vampire, and his henchmen are kidnapping the convention guests. A horror writer, a Sherlock Holmes fan and an Israeli Nazi-hunter set out to stop him.
Unfortunately the movie Nightmare in Blood is not yet available on HBO Max.
| Directing | John Stanley | Director |
| Production | Kenn Davis | Producer |
| Sound | David Litwin | Original Music Composer |
| Crew | Art Wendall | Special Effects |
| Production | Brian Kiley | Associate Producer |
| Costume & Make-Up | Gilda Forster | Costume Design |
| Costume & Make-Up | James Catania | Makeup Artist |
| Production | John Stanley | Producer |
| Editing | Harvey Katzman | Editor |
| Writing | John Stanley | Writer |
| Production | George Burrafato | Associate Producer |
| Writing | Kenn Davis | Writer |
| Camera | Kenn Davis | Director of Photography |
| Directing | Charlene Webb | Script Supervisor |
