>Halloween time: The Movie Channel has a 6 P.M.-7 A.M. “Horror Marathon” on Sat., Oct. 28, with 13 classic films including Dracula and Frankenstein. Rue McClanahan conjures up laughs as The Wickedest Witch (NBC, Mon., Oct 30.8:30 P.M. ET). And on Halloween, Nick at Nite offers a Bewitched marathon-four hours of the nose-twitching, ’60s sitcom starts at 8 P.M. ET.