Eureka Eureka

Wizards on Deck with Hannah Montana
8 pm/ET Disney
Three of Disney's biggest hits (Hannah Montana, Wizards of Waverly Place, The Suite Life on Deck) cross over in this 90-minute laughfest that is sure to please fans of all three shows. The fun begins when Justin, Alex and Max Russo join a teen cruise on the SS Tipton, which is, of course, the home of Zack and Cody Martin... and London Tipton. Justin is crazy about London and pretends he is a doctor to get a date with her. Later, it's a fan-feeding frenzy when Hannah Montana arrives on the ship for a concert. — Tim Holland

Are You Smarter Than a 5th Grader?
8 pm/ET Fox
Star Jones is a lawyer and Jack Hanna (we usually describe him as an "animal expert") is the director emeritus of the Columbus Zoo and Aquarium in Ohio, so we can assume that both know a thing or two. But what does Jones know about animals? How many  constitutional amendments can Hanna recall? And can either identify a cirrus cloud or the capital of Estonia? You can find out tonight. Jones, by the way, will donate her winnings to a Harlem school and Hanna will give his to the Columbus Zoo. — Paul Droesch

SpongeBob SquarePants
8 pm/ET Nickelodeon
To celebrate a certain little sea creature's big 10th anniversary, Nickelodeon is airing a weekend full of SpongeBob SquarePants episodes. Things kick off with a new episode in which SpongeBob goes shopping for pants since all of his old ones shrunk. But there's a problem: The store has no square pants left, only round ones. Having no other choice, SpongeBob buys the round pants, and then becomes unrecognizable to his friends. Because after all, he's not SpongeBob RoundPants. — Jennifer Sankowski

9 pm/ET Syfy
If you have ever wanted to see gun-toting, hard-as-nails Deputy Lupo (Erica Cerra) step out of character, you won't want to miss this misadventure, as a mishap with a DNA-monitoring system seems to change the no-nonsense officer of the law into someone a little more Fargo-friendly. Meanwhile, Carter must contend with a recertification exam that goes beyond the usual questionnaires and tests of strength. — Michael Chant

Real Time with Bill Maher
10 pm/ET HBO
Well, barring a "meltdown," in the words of Sen. Lindsey Graham (R-S.C.), Supreme Court nominee Sonia Sotomayor should be on her way to confirmation by the end of this week. But after two weeks off, Maher should have plenty to talk about tonight, including health care, President Obama's recent trip to Europe and Africa, and revelations of CIA assassination squads. On hand to discuss these topics and more are blogger Markos Moulitsas, playwright Anna Deavere Smith and Montana governor Brian Schweitzer. — Joe Friedrich