Paul Michael Glaser, Aya Sumika, Rob Morrow and Alimi Ballard, Numb3rs

NUMB3RS
10 pm/ET CBS
Paul Michael Glaser guest stars on tonight's explosive episode, which focuses on the bombing of a charity organization's headquarters. The investigation uncovers troubling aspects of the highly influential but controversial group and leads Don to probe into its far-reaching power base. — Tim Holland

For full episodes of Numbers, visit our Online Video Guide.

Greatest Holiday Moments: TV & Film Countdown
8 pm/ET NBC
It's no secret that holiday-themed programming is everywhere. But only a select few movies and specials have the staying power and instant heartwarming ability of the TV and film moments featured in tonight's countdown. Sure to make the list are classics like Rudolph the Red-Nosed Reindeer and It's a Wonderful Life, and more recent favorites like Home Alone and A Christmas Story. — Brie Hearn

For more holiday moments, visit our Online Video Guide.

Dog Whisperer
8 pm/ET National Geographic
Cesar Milan heads to Sin City to help three Cirque du Soleil acrobats whose discipline at work fails to translate at home when handling their problem pooches: a Maltese that plays dead when put on a leash, an American Eskimo that hates strangers and a tolling retriever that's petrified of pools. With the dog guru's help, these talented circus performers hope to become the ringleaders of their beloved pets. — Karen Andzejewicz

For full episodes of Dog Whisperer, visit our Online Video Guide.

Star Wars: The Clone Wars
9 pm/ET Cartoon Network
The "sheroes" of the Star Wars universe take center stage tonight as Ahsoka and Jedi Master Luminara have the unenviable task of escorting Nute Gunray to trial. Their journey is anything but safe as the unwitting duo is targeted by Count Dooku's apprentice, Asajj Ventress, who's been ordered to free the prisoner...at all costs. — Brie Hearn

For full episodes of Star Wars: The Clone Wars, visit our Online Video Guide.

Merry Christmas, Drake & Josh
8 pm/ET Nickelodeon
The guys face an incarcerated Christmas in a special holiday movie that reunites the cast of the sitcom Drake & Josh. It all starts when they work as Santa and his sidekick, promising a little girl that she and her foster family will have the best Christmas ever. As usual, Drake and Josh get into some trouble, but this time they land in court. The judge (Henry Winkler) sentences them to fulfill their promise — if they fail to, they go to jail. MMA fighter Kimbo Slice appears as Josh's cellmate. — Jennifer Sankowski

For clips of Merry Christmas, Drake & Josh, visit our Online Video Guide.