James Stewart stars in this whimsical 1950 comedy, playing a genial, often tipsy man who insists he is accompanied everywhere by his invisible friend, a six-foot-tall rabbit named Harvey. Also on tap tonight on TCM: 1959’s The Rabbit Trap at 10 p.m. ET, 1972’s giant-rabbits horror movie Night of the Lepus at 11:30 p.m. ET, and a pair of vintage Tex Avery/Chuck Jones rabbit cartoons at 1:15 a.m. ET. So, clearly, it’s Easter bunnies night on TCM…