Wednesday's Best Bets on TV

“Christmas in Washington” (8 p.m., TNT): Julianne Hough, Casting Crowns and Darius Rucker perform.

“A Muppets Christmas: Letters to Santa” 8 p.m., NBC): Three misdirected letters must be brought to Santa before he takes off on his Christmas Eve rounds. Can Kermit and his Muppet chums hop a plane and get those requests to the North Pole in time? “A Muppets Christmas: Letters to Santa” is an all-star, song-and-dance family special. Its flesh-and-blood cast includes Uma Thurman, Jane Krakowski, Nathan Lane, Richard Griffiths, Jesse L. Martin, Whoopi Goldberg and New York City Mayor Michael Bloomberg.

“The Gardens and the Grounds” (9 p.m., C-SPAN): This survey of the beauty and history of the 18-acre President’s Park features White House grounds superintendent Dale Haney.