Watch Nightmare in Blood (1977) full hd online Directed by John Stanley. With Jerry Walter, Dan Caldwell, Barrie Youngfellow, John Cochran. 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.