Adam Sandler’s performance at Sunday night’s “SNL50: Anniversary Special” was one of the most memorable moments of the night — even before it began. The performance was introduced by Jack Nicholson, who received loud applause inside Studio 8H. “Everyone in this room has something in common. All of our lives were changed by the show,” …

A star-studded and historic 50th anniversary special of “SNL” ended with Paul McCartney performing the famous medley of songs that ended the Beatles’ last-recorded album, “Abbey Road.”