London native William Henry Pratt adopted the stage name Boris Karloff while touring as an actor in Canada. After settling in Hollywood in 1919, he began acting in silent films and achieved stardom playing the monster in Frankenstein (1931). Thereafter typecast as a horror movie villain, Karloff went on to appear in more than 100 films. His most famous television performance was in the 1966 animated special How the Grinch Stole Christmas, in which he voiced which characters? Discuss