Watch a holiday classic: You may have seen the TV musical, the stage play or the house itself, but now it's time to bask in the glorious original: "A Christmas Story" returns for its annual 24-hour marathon on TBS and TNT. Watch for the house and all the other Cleveland shots, and for the 1983 Revere Marching Minutemen in the parade scene.

 

More movies: Another Christmas classic, "It's a Wonderful Life," airs at 8 p.m. on NBC. On ABC at 8, you can watch the original animated "Beauty and the Beast," while TBS is showing "The Wizard of Oz" at 6:45.

 

See Santa underwater: It's your last chance to see Scuba Claus at the Greater Cleveland Aquarium, as he'll swim with the sharks and eels from 1 to 2 p.m. The aquarium is offering lots of other holiday-themed activities during its Seas'N of Play, and it's open from 10 a.m. to 2 p.m. for Christmas Eve. It's in the Nautica Entertainment Complex, 2000 Sycamore St., Cleveland. http://greaterclevelandaquarium.com.