Nightmare in Blood is a 1978 American comedy horror film directed by John Stanley.
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.
The film ran in the drive-in theater circuit for nearly a decade and had a wide VHS release in the 1980s.
In 2004, Image Entertainment released the film on DVD.
It had its broadcast premiere with a national syndicated showing on Mr. Lobo's Cinema Insomnia.