While American Idol and its 28.3 million total fans steamrolled along as the night's champ  and goosed House's audience to an impressive 20.6 mil  Tuesday also saw two solid premieres. CBS' The Unit ranked second in the 9 pm hour with 18.2 million samplers, while across the dial the double-episode debut of ABC's Sons & Daughters averaged 7.92 mil, besting Scrubs' own one-two punch. Not all the ratings news was good, however: Joey's return was witnessed by just 3.95 million viewers, while The Amazing Race's new 10 pm berth drew a dearth of fans, losing 52 percent of The Unit's audience. That's not so amazing.