In one of the most complicated and entertaining Tribal Councils ever, a brutally honest conversation leads to surprising revelations.

Frankie is made an example of in front of the entire class when she doesn't make a good impression on her first day of dental assisting school with no-nonsense teacher Mrs. Armwood. Meanwhile, because Axl's broken foot may end any chance of his receiving a college sports scholarship, Frankie and Mike insist that he up his grades and get himself a tutor; and Sue and Brick think they've stumbled upon an expensive item inside an old safe and try to get big bucks for it from a local pawn store employee.

The Top 20 singers perform.

After Detective Lance arrests Oliver for murder, Oliver tells Moira the only lawyer he'll allow to represent him is Laurel. Laurel takes the case which puts her at odds with her father. Oliver offers to take a polygraph in front Detective Lance but things get tense when Lance asks him if anyone else was on the island with him. Oliver flashes back to when he got his first scar, courtesy of Deathstroke.

Marty and Debbie find out all the facts of alien love when Zabvronian mating season coincides with their wedding anniversary. Debbie longs for a little more romance in her marriage after she learns about the more cerebral Zabvronian way, while Jackie Joyner-Kersee is fascinated by humans' more physical approach. Meanwhile, a handsome jock invites Amber to a make-out party and she decides to go, with Reggie Jackson tagging along.

The team travels to the Governor's Mansion in Hampton Falls, New Hampshire, where there are rumors of hauntings caused by State Senator Warren Brown's illegitimate child, who was murdered; TAPS heads to Kentucky to help a woman with reports of seeing figures and hearing odd noises in her home.

A remote, bleak speck of rock in the middle of the Pacific, Easter Island, or Rapa Nui, has mystified the world ever since the first Europeans arrived in 1722. How and why did the ancient islanders build and move nearly 900 giant statues, or moai, weighing up to 86 tons? And how did they transform a presumed paradise into a treeless wasteland, bringing ruin upon their island and themselves? NOVA explores controversial recent claims that challenge decades of previous thinking about the islanders, who have been accused of everything from ecocide to cannibalism. Among the radical new theories is that the islanders used ropes to "walk" the statues upright, like moving a fridge. With the help of an accurate 15-ton replica statue, a NOVA team sets out to test this high-risk, seemingly unlikely theory - serving up plenty of action and surprises in this fresh investigation of one of the ancient world's most intriguing enigmas.

When prostitutes in Miami are discovered murdered in a similar style to local animals found dead there, the BAU must work fast to find an UnSub whose confidence is quickly escalating. Also, Morgan tries to increase Reid's athletic skills by convincing him to join the bureau softball team.

Sam and Dean investigate a murder and find Garth is already on the case. Dean is not happy to learn that Garth has assumed Bobby's duties, but Garth points out that both Sam and Dean have been missing for the last year and someone needed to do it. They guys discover an "avenging ghost" is responsible for the murders and they need to find the source before the killings starts again.

Phil and Claire get the dreaded late night call that Haley has been arrested for under-aged drinking, so they bring Mitchell, the family lawyer, in tow to the police station. Cameron stays back to watch over Alex and Luke, but they get into some crazy mishaps under his care. Meanwhile, Jay gets out of baby shopping with Gloria, but ends up having to deal with a surprise visit from Dede, and tries to scoot her out before Gloria gets home to prevent Dede from seeing that she's pregnant and to avoid the potential blowback.

Demi Lovato and the Young Adults: Paige Thomas, Jennel Garcia and CeCe Frey, L.A. Reid and The Over 25s: Vino Alan, Tate Stevens and Jason Brock, Simon Cowell and the Groups: "Lyric145", "1432" and "Emblem3" and Britney Spears and the Teens: Arin Ray, Beatrice Miller and Carly Rose Sonenclar take to the stage and there is a 13th artist that will join them! Plus, "1432" get a new name!

The KKK (Kimantha, Kenzie and Kaitlyn) are lost without their leader, when Dalia decides that her dad's fiance is her new best friend and they turn to Tessa and Lisa. Dalia turns to Evan for support,as she struggles with her emotions over her dad's elopement. Tessa had to help her regain her confidence and friends. Meanwhile, George and Dallas get intimate, but it's not really what George imagined.

The Coach of the West Las Vegas University basketball team is a difficult, imperious, petty tyrant with a complicated personal life - and when he's found bludgeoned to death in his locker room, Detective Russell's son Charlie is the prime suspect.

In the Season 16 finale, Cartman believes he can affect the outcome of the 2012 presidential election.

Twenty-one contestants compete for fifteen spots in real-world challenges administered by the judges.

A patient claiming to be Anne Frank is committed to Briarcliff. Meanwhile, Word of Arden's assault on a prostitute gets out, but Sister Jude is more interested in the fact that he has Nazi memorabilia... and Anne claims that she saw Arden Auschwitz. Also, Thredson offers to get Lana out if she consents to be killed, and Kit discovers the truth about Grace.

Casey confronts Detective Voight about his harassing tactics, vowing never to back down, and ends up paying the price for his decision. Dawson faces disciplinary action for her on-the-job conduct. Meanwhile, Severide finds his arm failing him during a rescue at a construction accident, and reaches out to Anna, an old flame and pharmaceutical rep, hoping she might be able to help alleviate his injury problems.

Rayna considers moving on after Deacon starts to set boundaries in their relationship; Juliette struggles with her mom's addictions and Deacon offers a helping hand - which leads to difficult memories from his past; Teddy is worried that his mayoral campaign will be derailed when his past with Peggy and his financial troubles border on being exposed; and tension with Avery and Gunnar is at a boiling point, as Scarlet feels the pressure to pick her path.

Coming Soon...

After Korie decides the junk piles in the Duck Commander warehouse are beginning to reach critical mass, she calls on Willie and the guys to do a little company spring-cleaning. But the discovery of an old Ping-Pong table deep within the clutter quickly turns the chore into an all day table tennis tournament. Meanwhile, Uncle Si realizes that he's many years overdue for an appointment with the local eye doctor and ventures out for some new glasses.

After attending a local radio show as a guest, Willie sees an opportunity to host a show of his own. When the station gives him the opportunity, Willie makes the mistake of bringing Uncle Si on the air with him. Jase gets fined by his neighborhood homeowners association for a multitude of local infractions, and decides to fight his case like a true Robertson.

Moonshine season in Appalachia has begun. Tim and Tickle are back, as we are introduced to some old school shiners -­ all looking to grab a piece of a $100 million dollar jackpot - tax free. But with a new lawman in town, everyone will be watching their backs.

Sketches include a man who goes to extremes while chasing his girlfriend; and a nonstop party for the electro-pop duo LMFAO.

Nate Silver

Russell Brand, Dave Attell, Cat Power

Doris Kearns Goodwin

Brian Williams, Ne-Yo

Daniel Craig, Dave Salmoni, Diamond Rings

Carrie Fisher, RZA

Tyrone & Hailey follow the advice of a feng shui expert or 'energy ecologist' throughout construction of their new house. An owner-built labour of love, their passive solar building has a curved living roof planted with native grasses.

The collapse of Owen Pierce's trial has left the case wide open and there's still a killer on the loose, but Banks remains determined to build a watertight legal case against his prime suspect. As the investigation continues, Morton and Jackman uncover promising new leads focusing on Ellie's ex-boyfriend Tyler, but just as they seem to be getting close to the truth, another schoolgirl is murdered, putting Pierce in the spotlight once again.

Hiding in an Asteroid, surrounded by a Simulant Death Ship and a fleet of Annihilators, the Dwarfers begin to wonder whether this is the beginning of the end. Only one man can save them. Unfortunately that man is Arnold J. Rimmer.

While Sam and Stephen grow closer, the Byzantium team is perplexed by Jack Turner's connection to Fatima Zahir (Meera Syal), a Pakistani presidential candidate. As Byzantium races against time, it seems inevitable that Jack will be successful. Meanwhile Sam's investigations into Hourglass lead her to connect someone from her previous mission with the Pakistani dam - helping her realize who their client is.

Dot buys Vicky a new car and comes close to driving her off a mental cliff. Sarah tries to give Jack advice on his interview technique as he attempts to find a new job at a newspaper away from Hebburn.