Regarding the blind hermit from "Young Frankenstein", this parody scene is taken from James Whale's BRIDE OF FRANKENSTEIN (1935), as the name Igor came from Bela Lugosi's portrayal of Ygor in SON OF FRANKENSTEIN (1939), which featured Karloff's 3rd and final time playing the monster. Lionel Atwill was also in SON OF as the police inspector with a false arm, also a character in Brook's YOUNG FRANKENSTEIN.