TELEVISION THIS WEEK
Ten shows to watch or record:
• “Elseworlds” (8 p.m. Sunday, the CW): Superheroes unite! It’s time for an epic, threepart mashup starting with “The Flash” and followed by “Arrow” (8 p.m. Monday) and “Supergirl” (8 p.m. Tuesday). The crossover fun — and weirdness — begins when Barry Allen (Grant Gustin) and Oliver Queen (Stephen Amell) wake up one morning and realize they have swapped bodies with each other. They set off to find out what disturbed the timeline to cause such a radical role reversal and eventually realize they need Supergirl’s (Melissa Benoist) help.
• "Dancing With the Stars: Junior" (8 p.m. Sunday, ABC): The first season comes to an end in a holiday-themed finale as the four remaining kid couples strut their stuff in two dances and a champion is crowned. • "Counterpart" (9 p.m. Sunday, Starz): After a critically acclaimed first season, J.K. Simmons returns for an explosive Season 2 of the sci-fi series, which dives deeper into the psyche of each counterpart, peeling back history and searching to find that one diverging incident that separates one from their other.
• “CMA Country Christmas” (8 p.m. Monday, ABC): Reba Mcentire is the host for this special that features performances by Tony Bennett, Dan + Shay, Brett Eldredge, Amy Grant, Diana Krall, Dustin Lynch, Martina Mcbride, Brad Paisley and others.
• “Darci Lynne: My Hometown Christmas” (9 p.m. Tuesday, NBC): Ventriloquist Darci Lynne Farmer, the 2017 winner of “America’s Got Talent,” celebrates the holidays Oklahoma-style on this special. Joining her are her various puppets, along with Kristin Chenoweth, Toby Keith, Hunter Hayes, Pentatonix and Lindsey Stirling. • “Ellen’s Game of Games Holiday Spectacular”
(8 p.m. Wednesday, NBC): Ellen Degeneres mixes laughably naughty with playfully nice. Games include “It’s a Wonderful Wife,” “Danger Word,” “Blindfolded Musical Packages,” “Dizzy Dasher,” “Know or Go” and “Hot Hands.”
• “Mom” (9 p.m. Thursday, CBS): This week's new episode is titled “Foot Powder and Five Feet of Vodka.” A search by Christy (Anna Faris) for the perfect Secret Santa gift leads her to discover Adam (William Fichtner) has been hiding something from Bonnie (Allison Janney).
• “Fuller House” (available Friday, Netflix): Season 4 of the family comedy picks up shortly after the events of Season 3. Kimmy (Andrea Barber) is now a surrogate to the baby of Stephanie (Jodie Sweetin) and Jimmy (Adam Hagenbuch), and D.J. (Candace Cameron Bure) and Steve (Scott Weinger) are finally ready to start dating.
• “The 87th Annual Hollywood Christmas Parade” (8 p.m. Friday, the CW): Are you ready for this massive procession down Hollywood Boulevard, with fancy floats, marching bands, celebrities and bloated balloons?
• “Christmas Pen Pals"
(8 p.m. Saturday, Lifetime): The feel-good holiday movies just keep coming. In this one, the creator of a dating app (Sarah Drew) heads home for the holidays and runs into her high school boyfriend (Niall Matter). We’ll let you figure it out from there.