The Ghost of Frankenstein is a 1942 monster movie starring Lon Chaney, Jr. as the monster and Bela Lugosi as Igor. Also in this are Cedric Hardwicke, Ralph Bellamy who was in The Wolf Man with Chaney, Lionel Atwill and Evelyn Ankers (who was also in The Wolf Man).
Youtube has it in 7 segments, which should autoplay from here:
1000 Misspent Hours says it "manages to deliver a reasonably satisfying monster movie experience." Moria calls it "a sad comedown after three excellent predecessors." The New York Times says, "Aren't there enough monsters loose in this world without that horrendous ruffian mauling and crushing actors? For that, as a matter of fact, is about all he does in this film".