Excluding the 2008 premiere, which was boosted by interest in that year's Presidential election and featured a guest appearance by Tina Fey as Gov. Sarah Palin, last night's 5.3 household rating in the metered markets matches the show's highest debut rating since 2005 (with host Steve Carell and musical guest Kanye West, 5.8/14 on October 1, 2005). The 5.3 ties the 2006 season opener (with host Dane Cook, musical guest The Killers, 5.3/13 on September 30, 2006).Like last spring’s Betty White show, last week’s was loaded with alumni: Rumored future hosts: Oct. 9: Jane Lynch (“Glee”) Oct. 23: Emma Stone (“Easy A”) Oct. 30: Jon Hamm (“Mad Men”) 11:30 p.m. Saturday. NBC.