Dream Snippet: Hammer horror special guest star

At a science fiction convention, I ducked my head into the film room. They’re showing a classic Hammer vampire movie, with Peter Cushing, Christopher Lee, and… Ernie Kovacs? Specifically, Kovacs in his character as Percy Dovetonsils. Sadly, I didn’t stay long enough to figure out whether he was a Renfield, a vampire Hunter, or what.