UPDATE correcting info: A repeat of the Tom Hanks-Keith Richards SNL from 1988 will air as the primetime episode of Saturday Night Live this week. Melissa McCarthy is hosting the new SNL. On Sunday, NBC is airing another late-night staple in primetime for the February sweep: a two-hour Tonight Show Valentine’s Day Anniversary Special is set for Sunday from 9-11 PM. That comes ahead of a week of Jimmy Fallon broadcasts from Los Angeles.