On the eve of the Smallville High School Prom, stuck-up candidate for Prom Queen Dawn Stiles is pulled into a coma when she is involved in a car crash into a ravine filled with dozens of chunks of kryptonite. While her body lies in a coma, Dawn finds her spirit allowed to possess the bodies of others, where she can continue her quest to become Prom Queen. As a result, Martha, her body possessed by Dawn, flirts with Clark and asks him to the Prom, Lana attempts to electrocute the ex-boyfriend who dumped Dawn, Lois goes all-out to ensure she and Clark go to Prom together, and Chloe attempts to set fire to the school on Prom night.

Last night, American Idol's Top 7 sang their hearts out in hopes of winning America over. Find out tonight LIVE who will survive and who will be sent home. The contestant who received the fewest votes will be eliminated from the race for the American Idol title.

Was your childhood eating plagued with plate-loads of slimy, foul-smelling leaves? Host Alton Brown shows how to turn fiend to friend when he takes on dark leafy greens. Tune in and you might learn a thing or two about nutrition too.

Vaughn and Sydney tell Jack about Sloane's involvement with Vaughn's father, and Irina's contact, but after talking with him, they find out that someone is framing Sloane. Soon they realize that the other Sloane is a clone, and Sloane decides it's best to step down, but Sydney disagrees. She says that it will be best because he knows exactly what the new Sloane will do, but Nadia is fearful that in her father's hunt to capture the new Sloane, he'll start to become obsessed again with Rembaldi.

The girls are put on the spot in this week's challenge. One girl has a hard time disassociating the photo shoot from her personal life.

A work event in a ballpark skybox leads Carrie, Doug and his buddies out to the game - but when an important client finds fault with Doug, Spence has to step in as the devoted husband. At Arthur's dinner party, guest Bernard, turns the table against him.

A Costa Rican getaway - as far removed from everyday living as you can imagine: lush rainforests and deserted tropical beaches. Marooned on Costa Rica's Osa Peninsula, Les 'Survivorman' Stroud has only a few items to aid him for the next 7 days: swimming goggles, 3 ballpoint pens, a multi-tool and the clothing on his back. On top of the keeping hydrated in the intense humidity and relentless heat, Les must cope with deadly snakes, enormous spiders, land-crabs and scorpions.

Fontana and his temporary partner, Det. Nick Falco, must tread lightly when they discover links between a powerful police commissioner and the murders of an infamous porn actress and a maverick publisher.

The girls are now in Atlantic City, where they heat things up when they intern as firefighters. And also the girls try to become friends of he kids of their new host family, but their plan backfires.

Jimmy is having trouble controlling his body, and it seems like it could hurt him in the school's big talent show. So, he goes on a journey to "fix" the problem.

TONIGHT: Host of CNBC's "Dennis Miller," Dennis Miller! Plus, Rob Corddry reports on "Dormaid."