As the wedding approaches, Brooke tries to connect with Sylvia, while Julian looks for his best man at a guys' poker night. Meanwhile, Nathan struggles in his new job, while Haley's counseling abilities are challenged, and Skills returns to town with a new friend.

The 200th episode results are in and Kyle Massey and Lacey, Rick Fox and Cheryl, Brandy and Maks, Bristol Pailin and Mark, Kurt Warner and Anna and Jennifer Grey and Derek are the ones waiting for their chance to win "Dancing with the Stars". Is a favorite going home tonight?

It's the adventure of a lifetime when 'The Biggest Loser' contestants are whisked away on military trucks to Camp Pendleton, where they will live and train like Marines for the week. There, they hit the ground running with a fast-paced week of activities led by a select group of Marines. It's non-stop action, from hiking with oversized backpacks to early morning rifle exercises to an intense obstacle course challenge that pits blue team vs. black, with a prize the players want now more than ever. While some struggle with the physical challenges and the adjustment of being away from the ranch, others thrive, and one even shaves his head to be just like the Marines! Later, the players meet up with trainers Bob Harper and Jillian Michaels at the Camp Pendleton gym for a Marine-style last chance workout, and then a weigh-in full of surprising numbers is followed by another player being eliminated.

Certain perfect bubbles in the Rafter world all burst in the most unexpected and confronting ways.

How do elevators work? Are they safe? Why are so many people afraid of them? Across North America, elevators move 325 million passengers every day, and most of the time, people don't give them a second thought. In Trapped in an Elevator, NOVA reveals the secret life of these ubiquitous machines and investigates personal stories of those who have been caught inside when they do fail. NOVA cameras ride the world's fastest elevator to the top of the Burj Dubai, the world's tallest building, and test whether the Burj's elevator system is ready for the task of moving people to unprecedented heights. On the other side of the world, NOVA follows one of the thousands of elevator maintenance crews in Manhattan that keep New Yorkers moving up and down every day. Then, at the Otis Test Tower-a 28-story high-rise that's the most over-elevatored building in the world-viewers experience a few heart-pumping moments as a test elevator is sent into free fall. Once brawny but simple machines, elevators are getting a brainy makeover. Computer controls, like those in the elevators at the Marriott Marquis in Times Square, are getting passengers to their destinations faster and more safely than ever before. But will the elevator-wary be comfortable handing over the reins to computers?

Mike helps the U.S. Fish and Wildlife Service in battling the sea lamprey population that threatens the fishing industry of the Great Lakes. Also, Mike makes meat gel to feed fish in Mandalay Bay Hotel and Casino's shark reef aquarium.

Paul wants to address Jesses reluctance to contact his birth mother.

Colonel Young doubts his own sanity when he has visions of Destiny destroyed in an enemy attack.

Cate, Ryan, Baze, and Math volunteer to chaperon Lux's school camping trip. During the trip, tension rises between Cate and Ryan, while Baze grows closer to Emma. As Lux gets more intimate with Eric, Tasha urges her not to take that risk with her future.

Paul tells Adele that he feels betrayed and worries about how his illness will impact the children.

Still in Ireland; the club embarks on a protection run, the likes of which they've never seen before.

Michael Beschloss

Chrystia Freeland, David Frum

TBA

Captain America is revived after his frozen body is discovered in the Arctic, so Baron Zemo battles him while Arnim Zola distracts the other Avengers with an attack on New York City.

Kevin meets Robert and Milla Gaukroger who purchased a plot of land overlooking Lake Windermere in the Lake District National Park. They plan to redevelop the 1980s house on the site which will end up quadrupling its size.

The remaining contestants are challenged by Sir Alan to open pop-up fashion shops in the Trafford Centre in Manchester. One of the candidates from the loosing team is fired by Sir Alan at the end of the show.

Famed for their ability to inflict Armageddon from outer space, asteroids are now revealing the secrets of how they are responsible for both life and death on our planet. Armed with an array of powerful telescopes, scientists are finding up to 3000 new asteroids every night. And some are heading our way. But astronomers have discovered that it's not the giant rocks that are the greatest danger - it's the small asteroids that pose a more immediate threat to Earth. Researchers have explained the photon propulsion that propels these rocks across space, and have discovered that some asteroids are carrying a mysterious cargo of frost and ice across the solar system that could have helped start life on earth.