Four nights too late for Valentine’s Day, “Second Honeymoon” (7 p.m., Hallmark) offers a grown-up variation on “The Parent Trap.”

After 20 years of marriage, Maggie (Roma Downey, “Touched by an Angel”) and George (Tim Matheson, “The West Wing”) decide to call it quits and get divorced. Too bad they didn’t tell the kids first — they may not have bought them tickets for a surprise trip to a tropical island for their 20th anniversary. That says more about their emotional radar than anything else, but hey, this is a Hallmark movie, where trips to lush vacation spots can repair any rift and every day is Valentine’s Day.

• Comedy Central repeats Nick Cannon’s (“America’s Got Talent”) first comedy special “Nick Cannon: Mr. Showbiz” (10 p.m.).

• Former regular Maya Rudolph returns to host “Saturday Night Live” (10:30 p.m., NBC), featuring musical guest Sleigh Bells. She’s had a pretty interesting year. She was the solid, sane best friend and bride in the anarchic “Bridesmaids” (co-written by “SNL” regular Kristin Wiig), as well as the vain and glorious talk show diva on “Up All Night.” And as such she’s the best thing about that show.

Tonight’s other highlights

• NASCAR ‘s Budweiser Shootout (7 p.m., Fox).

• Between seasons of “The Amazing Race,” host Phil Keoghan embarks on a 3,500-mile cross-country bicycle adventure in the documentary “The Ride” (7 p.m., Showtime).

• The ash comes down on “The Fades” (8 p.m., BBC America).

• Guys of a certain age straddle motorcycles in the 2007 comedy “Wild Hogs” (8 p.m., ABC), starring Tim Allen and John Travolta.

• Daniel Radcliffe, Omid Djalili and Sinead O’Connor appear on “The Graham Norton Show” (9:15 p.m., BBC America).