Starved of live broadcasts of Saturday Night Live since the writers' strike began in Early November, fans of the show returned en masse Saturday night. According to Nielsen overnights, SNL, hosted by Tina Fey, drew a 4.1 rating and a 15 share, or about 6 million households, its biggest audience in more than a year and some 36 percent higher than its pre-strike average this season. Guests on the show included Carrie Underwood, Steve Martin, and presidential contender Mike Huckabee. Last week, producer Lorne Michaels said that he plans to squeeze in as many live shows as possible between now and the end of May.