Mad scientist Boris Karloff escapes from prison with hunchbacked assistant Daniel (J. Carrol Naish). He plans revenge against the men who put him there and wants to revive the Frankenstein monster. Along the way they revive Dracula (John Carradine) and Lawrence Talbot (Lon Chaney Jr.) pops up as the Wolf Man. Silly but enjoyable all-star monster mash. Naish, Karloff, Carradine are all very good as is Elena Verdugo as a gypsy who falls in love with Talbot. Chaney Jr. just walks through his role. No great shakes (or scares) but there's tons of atmosphere, beautiful sets, pretty good special effects and it moves quickly. Worth seeing.