James Stewart plays an amiable drunk whose avowed constant companion is an invisible rabbit that’s over six feet tall, and the point, as in Don Quixote, is that a victim of delusions may be better off than the rest of us. The undistinguished Henry Koster directed this popular piece of whimsy (1950), adapted from a popular play; Josephine Hull, playing Stewart’s sister, won an Oscar for her pains. 104 min. (JR)