Alums, former hosts and seemingly everyone who’s ever entered “SNL’s” orbit was on hand to celebrate the show’s 50th Anniversary. “SNL50: The Anniversary Special” was part reflection, part reunion and a culmination of festivities that began on Friday with a concert.

Sunday night. Some of the moments generating the most buzz:・Jack Nicholson made his first public appearance in years—the 87-year-old introduced Adam Sandler from the audience. Sandler then performed a musical homage to Lorne Michaels,