What to Watch on Saturday: Kristin Wiig and The xx on ‘SNL’

Saturday Night Live (11:30 p.m., NBC) – Kristin Wiig hosts and The xx are the musical guests.

Also on tonight . . .

My Christmas Dream (8 p.m., Hallmark) – A department store manager sets out to impress the owner with an amazing holiday display window, and falls in love with a recently fired employee who helps her.

Nightmare Wedding (8 p.m., Lifetime) – A woman comes to regret a past indiscretion with her fiance’s best friend when he becomes their best man.

Killing Season (9 p.m., A&E) – Two new episodes again in this new docu-series. First, Josh and Rachel probe similarities between a serial murder case in Atlantic City, N.J., and the killings at Gilgo Beach. At 10, they talk to a sex worker who believes she encountered the killer.

Welcome to Sweetie Pie’s (9 p.m., OWN) – In the Season 4 opener, Miss Robbie is devastated by the senseless murder of her grandson, Andre.

Austin City Limits (Midnight, UNC-TV) – Performers at the Americana Music Festival include Dwight Yoakum, Billy Bragg, George Straight and Bonnie Raitt.