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Rap artist Coolio and ex-Watergate felon G. Gordon Liddy are booked for the ABC premiere of Bill Maher's Politically Incorrect. PI launches at 12:05 a.m., after Ted Koppel's Nightline on Jan. 6. Four guests from various professions will appear each night, sparring with Maher over issues of the day. Other guests set for premiere week: actors Charlton Heston and Tony Danza, Rep. Pat Schroeder, D-Colo., and comedians Paul Rodriguez and Jay Thomas. ... Coolio is also set to guest-star tonight as himself on a holiday episode of Sabrina, the Teenage Witch, airing at 9 on ABC. Coolio helps Sabrina, played by Melissa
-1Joan Hart, find her kitty-napped cat.