I SPY AN UPROAR: ABC won't debut a fourth season of Alias until January '05, allowing the serial thriller to enjoy an uninterrupted, rerun-free 20-episode run. The network's new fall lineup — presented to advertisers today in New York — will feature eight new shows. Among them: Lost, a drama from Alias creator J.J. Abrams, the Teri Hatcher-headlined soap Desperate Housewives and James Spader's Practice spinoff, Fleet Street. Meanwhile, 8 Simple Rules moves to Friday, where it will kick off ABC's TGIF lineup.