The TV season is swinging into the holidays, with specials like "The CMA Country Christmas" and "Christmas in Rockefeller Center" debuting this week.

But that doesn't mean all your favorite shows are reruns. In fact, there's a massive four-part superhero crossover happening on The CW that promises to be action-packed and full of fun.

RELATED: Everything we know about the 2016 'Arrow'-verse crossover

Here are the top five must-see shows for the week of Nov. 27 through Dec. 2.

'Once Upon a Time,' 8 p.m., Sunday, ABC

The Evil Queen (Lana Parrilla) is about to make a big decision regarding Mr. Gold (Robert Carlyle), while Belle (Emilie de Ravin) is going to make a big sacrifice. Considering that Belle is pregnant, we don't really like where this is going.

DC superhero crossover, 8 p.m., Mon-Thurs, The CW

Supergirl (Melissa Benoist), The Flash (Grant Gustin), Arrow (Stephen Amell) and the Legends of Tomorrow gang are joining forces for a four-part crossover event to stop an alien invasion of Earth. It looks pretty epic.

'Leah Remini: Scientology and the Aftermath,' 10 p.m., Tuesday, A&E

Leah Remini continues her quest to speak out about her time with the Church of Scientology. In this eight-part special, she'll not only relay her own experiences, but speak to other ex-Scientologists about their experiences with the church.

'Black-ish,' 9:30 p.m., Wednesday, ABC

In "Being Bow-Racial," Rainbow (Tracee Ellis Ross) must confront her feelings about being biracial when Junior (Marcus Scribner) brings home his white girlfriend.

'The Great American Baking Show,' 9 p.m., Thursday, ABC

"The Great Holiday Baking Show" was such a success in 2015 that ABC is bringing it back in the form of "The Great American Baking Show," the U.S. version of the U.K. hit "The Great British Bake Off." This season will boost the number of episodes from four to eight and increase the number of bakers from six to 10. Each week will feature two back-to-back episodes.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."