Aiden is in danger; Melinda investigates the life of an angry murder victim.

Tess tries to break into Watchtower, but inadvertently traps herself and Chloe in the security system. While Chloe tries to stop the Kandorians from downloading information from her server, Oliver pays the price when he confronts Zod, unaware that he now has superpowers.

After a neighbor is murdered, Allison's fears for her own family prompt her to install a high-tech talking burglar alarm, which she later suspects may be communicating with Marie. Also, Ariel meets a ghost who could help her get into the college of her choice.

After Mace and Anakin are trapped, R2 must go back to Coruscant to inform the other Jedi.

Greer is trapped in rubble and left for dead on a desolate planet.

When one cop leaves his partner to fend for himself during a pursuit, Frank gets involved.

Topics include: school curricula; physical altercations; human anatomy; whistling and happiness; birds and flight; Karl's thoughts on doppelgangers and the Big Bang; and the origins of the universe. Also: a "Monkey News" segment about eye surgery.

In the wake of the loss of one of the group members, Lily takes some drastic steps to change her life. Similarly, Carla finds herself inspired to shake things up in her ordered domestic existence.

Coming soon...

Plo Koon and Ahsoka Tano join forces to trackdown a fugitive. The chase leads them to Florrum, where a showdown is bound to take place.

Guests: Rep. Anthony Weiner, political commentator Chris Matthews, economist Laura Tyson, author Ross Douthat, politician John Bolton

Topics: Gulf of Mexico oil spill, oil dependency, High-speed rail technology, Goldman Sachs Senate hearings, Arizona immigration law, Charlie Crist, 2010 midterm elections

Having trouble letting go of his leadership position, Ron and Henry clash at a fundraiser where parents will do anything to get their kids into an exclusive elementary school.

Coming Soon...

Professional soccer player; David Beckham; comic Mike Birbiglia; the Hold Steady performs

Mickey Rourke; Ashley Graham; Comic Kevin Meaney.

Knowing that the next contest is going to be a double performance, Dawn begins training Mamoswine and Cyndaquil. Zoey arrives and decides to help Dawn with her training.

Trapped among an army of Weeping Angels, the Doctor and his friends try to escape through the forest dome. Meanwhile, Amy finds herself facing an even more deadly attack.

Actress Karen Gillan tells how the 'Crack in Time' series story arc fits into this episode, while writer Steven Moffat describes how the very first crack in time was actually in his son's bedroom wall. As we prepare to say goodbye (for now) to River Song, the cast and crew examine the character's shady story so far and speculate about her possibly even shadier future, while Gillan gives a guided tour to Amy Pond's bedroom. Featuring interviews with Matt Smith, Karen Gillan and Alex Kingston.

More hopefuls audition in front of the judges hoping to gain a place in the next round of the competition. Dance troupe AKA manage to impress the judges and make it through. Flute Magic don't manage to impress Simon but Piers and Amanda decide to put them through anyway. Boyband Connected are given a second chance after Simon says their first performance was 15 years out of date. After performing again all the judges decide to put them through to the next stage of the competition. 14 year old Olivia Archbold manages to vow all the judges with her voice and sails through to the next stage of the competition.

Adam finds himself facing a terrifying ordeal at gunpoint as he's held hostage in the farmhouse. Zoe finds herself having to make a choice between Jordan and Matt