Christina Applegate, Samantha Who?

Samantha Who?
9:31 pm/ET ABC
In the Season 2 opener, there are two major problems when Sam teams with her mom in a dance contest: Her mom's nemesis (Cybill Shepherd), who is also in the competition, has a partner who's a ringer (Mark Ballas from Dancing with the Stars). More important, whereas Sam was a very good hoofer before the coma, post-coma Sam can't remember how to dance. — Fred Mitchell

For full episodes of Samantha Who?, visit our Online Video Guide.

Chuck
8 pm/ET NBC
The very last minutes of last week's episode marked the unforeseen return of Bryce Larkin (Matthew Bomer), Sarah's ex-flame and Chuck's nemesis. Brace for more Bryce tonight: He and Sarah go undercover (or under the covers?) as an overly affectionate couple in a new mission. Of course, this spikes Chuck's jealousy and sorely tests his blooming love with Sarah. At Buy More, Morgan tangles with strip-mall bullies, headed by the menacing Mitt (former NFL star Michael Strahan). — Dean Maurer

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

My Own Worst Enemy
10 pm/ET NBC
Christian Slater makes the jump to television tonight, playing a man with two distinct personalities: middle-class everyman Henry Spivey and superspy Edward Albright. In the drama's opener, Henry grapples with strange "dreams" and soon learns about his alter ego. Or, rather, he learns that he is an alter ego. If you're scratching your head by now, imagine how poor Henry feels when he finds out there's an implant in his brain that has manufactured his whole identity. That's a recipe for a real personality crisis. — Brie Hearn

For clips of My Own Worst Enemy, visit our Online Video Guide.

SpongeBob SquarePants
8 pm/ET Nickelodeon
SpongeBob learns what it's like to be Samantha Who? when he gets hit on the head and develops amnesia. Soon he wanders far from home and into a whole lot of trouble when he meets up with New Kelp City's dangerous gang leader (voice of Ray Liotta) and his crew of Bubble Poppin' Boys. As SpongeBob deals with gang members and identity issues, his friends scour the ocean floor, hoping to find their missing buddy. — Jennifer Sankowski

Catch up on SpongeBob in our Online Video Guide.

Section 60: Arlington National Cemetery
9 pm/ET HBO
The third in a trilogy by Emmy-winning filmmakers Jon Alpert and Matthew O'Neill (Baghdad ER and Alive Day Memories: Home From Iraq), this 2008 documentary explores the area of Arlington National Cemetery reserved for military personnel who died in Iraq and Afghanistan. As one might expect, it's a somber, dignified affair, and besides shots of actual burials, most of the film consists of simple footage of and interviews with people in mourning who visit the area for Christmas, birthdays or no reason at all other than to tell their loved ones that they are missed. — Joe Friedrich

For clips of Section 60, visit our Online Video Guide.