Contestants chosen from around the nation endure a grueling rehearsal schedule and pressure-packed auditions as they vie for a coveted spot among the Top 24. Who will survive and who will go home?

It's nearly the halfway point of the season, so the contestants celebrate the occasion with a challenge involving the total of their weight lost to date. Plus, they receive an inspirational visit from their doctor to assess their health advances. There's also a surprise guest trainer - Jillian Michaels' mom, a psychotherapist, who helps the contestants begin to understand the issues in their past that have contributed to their weight gain. Then another elimination round leads to a heartbreaking farewell, as one more player is sent home.

16 house guests begin season nine by entering the compound and being matched up with their soul mate. The eight couples will be sharing household duties and will be eliminated as a couple.

When Ruby and Gracie can't seem to stop fighting, Jim is "forced" to read their diaries to determine the cause, only to realize that he needs to give out delicate motherly advice to them, while Cheryl is still away.

A look back at the plan to militarize space between the USA and USSR back during the Cold War era. Interviews from astronauts who were involved in the top secret American program, plus, a look at the Soviet "Almaz" spy station, which featured high-powered spy cameras and a cannon which could knock a satellite out of commission.

When the Cheyenne government orders an end to the conflict between Jericho and New Bern, Major Beck decides that something must be done to help Jericho regain its power and communication systems.

The Honorary Title performs at Tric and Mia plays her song there as well. Carrie tries to get closer to Nathan. Brooke sets Mouth up on a blind date with her assistant and Lindsey confronts Lucas about Peyton.

Mike Rowe gets dirty in Death Valley, CA preparing for a gem and mineral show.



He then helps save injured birds from a nearby salt lake.



Finally, he gets dirty working at a rice plantation in South Carolina.

Alex tells Paul about an encounter he had with a patient. Meanwhile Paul compares his father to Alex.

Shirley is torn when her law school sweetheart comes back into her life as opposing council, bringing back old feelings and alienating Carl.



Meanwhile, Alan and Denny flirt with the idea of swinging when they both have anonymous sexual encounters in the office, and Katie is threatened by Leigh who is jealous of her relationship with Jerry.

Sean experiences the ugly side of Hollywood in the form of a television critic. Matt experiences a special bond with one of Christian's patients. The cause of Julia's ailing health is discovered.

A stellar explosion, the supernova is the sensational death of a star. It can shine as bright as 100 billion Suns and radiate as much energy as the Sun would emit over 10 billion years. Jets of high-energy light and matter are propelled into space and can cause massive Gamma Ray Bursts and emit intense X-ray radiation for thousands of years. Astronomers believe that this process creates the very building blocks of planets, people and plants. Meet the world's leading Supernova hunters, and take a look at recorded supernovas throughout history.

Tonight, the editor of The Weekly Standard, Bill Kristol.



Jon begins tonight highlighting the best of the feud over who created Mike Huckabee and Jon's debt to Chuck Norris for completing his exercise gym, for his action pants, and tips on how to drive out of your own grave. Next, Jon looks at MTV's interview with Mike Huckabee and Huck's focus on religion.



Finally, Senior Correspondent Rob Riggle reports live from The Daily Show set on the difficult times the show has faced without writers.

Todd wins some cows in poker and convinces Leslie the Greens & Grains should sell them as "The Freshest Meat In Town". Being over-zealous, Leslie thinks customers could choose their cow like they do a lobster in a seafood restaurant. Leslie begins to feel a special bond with Todd, his "bro" but the real trouble comes in trying to convince the FDA to let them slaughter cows in the store.
Meanwhile a second "bromance" develops for Buck, who is trapped taking Richard to an Ice Skating audition for Lord of The Rings on Ice. Perhaps he can take this chance to make Richard a little more manly.

Tonight Stephen welcomes theoretical physicist from Harvard Lisa Randall, author of Warped Passages: Unravelling the Mysteries of the Universe's Hidden Dimensions.



Also, Stepehn talks with New York Governor Eliot Spitzer about his being a super-delegate for Hillary Clinton. Later, he talks with Washington D.C. Rep Eleanor Holmes Norton, who is a super-delagate for Barack Obaman.

Charming gangster Alphonse Gangitano, also known as The Black Prince, gets away with murder but finds himself in a deadly feud with the ruthless Moran Brothers.

Small time criminal Carl Williams takes the first steps towards building his own empire as the police renew their efforts in trying to crack the powerful 'Carlton Crew' gang.

Rukia continues her fight with the 9th Espada, Aaroniero Arruruerie.

Pru and Richard make plans to build a bespoke family home on an industrial site in the middle of the Midlothian countryside.

Torchwood encounter an alien called Adam who can change memories. Things take a turn for the worse as Jack is haunted by memories of his brother, Gwen struggles to remember Rhys, Owen professes his love for Toshiko, and Toshiko becomes convinced that she loved Adam.

Jack calls in an old friend for a favour, none other than Martha Jones, as they attempt to stop a pharmaceutical facility that uses aliens in the hope of discovering a cure for all diseases.