this moody and creepy horror flick begin on a castle atop a cliff overlook the sea and a great setting and a a vampire bat fly in and creep toward a sleeping doctor ( onslow stevens ) . the bat change into a man know a baron latos and in reality count dracula ( john carradine ) . he seek dr. edelmann help to cure him of his vampirism . eventually the good doctor also want to help his hunchbacked nurse assistant ( jane adam ) and the wolf man ( lon chaney ) and and frankenstein monster ( glenn strange ) . but dracula trickery contaminate the doctor blood and and he become a jekyll or hyde vampire himself . this be somewhat good than the prior year house of frankenstein and be less episodic and more exciting visually . there a haunting scene where dracula try to lure the second nurse ( martha odriscoll ) into his world and where she be initially play moonlight sonata on the piano and which soon give way to terrify music . director erle kenton use expressionistic shadow and eerie music to frame many sequence and include a wonderful montage sequence that the studio frequently use in their horror feature . two performer be of note represent stevens and with his wonderful voice and be at first sympathetic and then convincingly menace . adam and her beautiful face in alarm contrast to her twisted body and exhibit great pathos and sympathy . it all end in a slam bang climax and typical of 1940s universal horror and a little abrupt and with footage borrow from the ghost of frankenstein ( 1942 ) . i hope universal release it soon on dvd ( it be leave out of their double feature release ) .