Jennifer Lopez, Keith Urban and Harry Connick, Jr., continue to try and find the country's hottest talent in the next round of auditions.

When Abbott's old boss, Agent Peterson, threatens Abbott's career - and possibly his freedom - Jane devises a risky plan to protect his friend's future.

Joe wants Mel to stop taking birth control so they can start a family, but she's unsure. So he invites Nate (guest star Ian Reed Kesler) and Gillian (guest star Tamera Mowry) over with their new baby to see if he can change her mind.

Meanwhile, Lennox tries to help Zander (guest star Sterling Knight) move on by setting him up with her friend Lilah (guest star Ayla Kell), and Ryder announces his unexpected plans for the future.

Arsenal and Diggle confront Laurel about trying to step into her sister's shoes and warn her to stop before she gets herself killed. However, when Brick kidnaps the city's Aldermen and threatens to kill them all unless the police evacuate The Glades, it's all suits on deck. Meanwhile, Ray steps in to help Lance and the police force fight Brick, showing Felicity a new side of her boss. Malcom tells Thea that Ra's al Ghul is after him and his family and they must leave town immediately.

Tucker enlists Ben and Riley to appear on Mary Hart's program and reveal how they foiled an attempted mugging; Bonnie hopes to get rich by using Emma in a series of Internet videos.

Lives are at risk as Clarke and Lexa encounter a new enemy. Bellamy and Lincoln agree to work together to break into Mount Weather. Murphy helps Jaha confront his past. Meanwhile, Indra makes Octavia an offer she can't refuse.

Lucious attempts to steal a super-hot, chart-topping artist from his rival at Safe House Records. Meanwhile, Jamal struggles to compose original music and Cookie tries to forge a relationship with her estranged son, Hakeem.

After the British defeat, Aminata registers Black Loyalists in The Book Of Negroes for an escape to freedom in Nova Scotia.

Mike and Frank undertake a huge excavation to find a rare vintage auto that hasn't seen daylight in decades.

In a leafy suburb near Tampa, Florida, on February 28, 2013, a giant hole opened up under the bedroom floor of Jeffrey Bush, swallowing him as he slept. His body was never found. Bush was a victim of a sinkhole-a worldwide hazard that lurks wherever limestone and other water-soluble rocks underpin the soil. When carbon dioxide from the air dissolves in rainwater, it forms a weak acid that attacks soft rocks, riddling them with holes like Swiss cheese. Sinkholes can occur gradually when the surface subsides into bowl shaped depressions or suddenly when the ground gives way. These geological hazards have swallowed highways, apartment buildings, horses, camels, even golfers, with monster-size holes cracking the earth from Siberia to Louisiana. Filled with compelling eyewitness video of dramatic collapses, and following scientists as they explore the underlying forces behind these natural disasters, NOVA travels the globe to investigate what it's like to have your world vanish beneath your feet.

The BAU revisits its origins when they look at one of Rossi and Gideon's old cases to track a killer that got away.

In the first of the three-part finale, the three finalists head to San Miguel de Allende in Mexico where they are greeted by head judge Tom Colicchio who invites them to watch the final cook-off of Last Chance Kitchen and learn which eliminated chef will rejoin the competition. Award-winning Mexican chef Enrique Olvera introduces the Quickfire Challenge where the chefs must create a dish highlighting the Mexican ingredient xoconostle, a special type of prickly pear. San Miguel de Allende is a mecca for artists all over the world, and the chefs' creativity is put to the test when they are challenged to create a unique dish inspired by a local artist's work for the Elimination Challenge. Cooking at the famed Instituto Allende, the chefs will have four hours to prepare dishes for an event while their artists complete a new work of art that will be on display. The chef that doesn't translate the artist's vision will have to say "adiós" to the title of Top Chef.

The Golds get ready to make a new commercial for the store.

Donnie drags Paul on a last minute trip to check out the site of the new Wahlburgers' Las Vegas location. After their work is done, Donnie tries to get his unlucky brother to loosen up at the casinos - and prays that Paul's jinx isn't contagious. Back home, Mark takes a gamble of his own when he and his lookalike nephew Brandon place a bet on a one-on-one basketball game between Nacho and his very own mini-me, Brandon's friend, Pat.

When Willie becomes an assistant coach on Lil' Will's struggling football team, his authority is tested when the kids challenge the adults to a scrimmage. Meanwhile, Kay brings Jep and Si to an aquarobics class at a local health club.

Beth and Jack must diffuse the threat against a female lifeguard and her loved ones when she becomes the obsession of a mysterious stalker.

Lolly breaks her tradition with Becca and decides to go to Grumpy Rick's annual Halloween party with Jamie. The party gives Becca a chance to make a play for Andy. Sean's back in town from the honeymoon and it appears he's moved on to someone new.

When Psycho Pete, long lost member of the freight train, is released from the mental hospital, Dennis and Dee rush to get him recommitted while Charlie and Mac attempt to restore him to his former hard-partying form.

Malik attempts to get back onto the Sabers roster by manipulating Jason now that he's a coach. Tasha fully commits to motherhood and connects with her baby.

Malik manipulates Jason; Tasha commits to motherhood; Keira's humiliating experience.

After Bob helps Joy's grandson deal with a bully, Joy sees him in a new light. Melanie finds inspiration.

Louis is gaining leverage in his quest to become a name partner of the firm and the Pearson Specter team is dealing with the fallout of Louis learning Mike's secret.

The guys help Ders get even with an old high school swim team rival.

Alex asks for help in diagnosing a teacher with a mysterious illness; Charlie must explain his actions; Dawn must make a big decision.

Tensions simmer between Philip and Elizabeth as they disagree over handling orders from the Centre. When Elizabeth loses key intel, Philip enlists Annelise on a mission with an unexpected outcome. Stan tries a new approach to mending his marriage with Sandra amidst learning tough news about Nina.

Abbi gets her wisdom teeth removed and Ilana makes it her mission to take care of her, which unfortunately involves a cocktail of drugs and a lack of supervision.

Mike convinces Josh to go out for a wild night of clubbing, but Josh finds it hard to work up the courage necessary to approach women.

After a scandalous picture of Holly ends up in the newspaper, her engagement is left on the line.

Oscar Isaac

Conan O'Brien was joined by Katherine Heigl and Drew Brees, plus music from Milo Greene.

Gina returns! Jenny lobs a grenade into Fiona's past.

Larry discusses the Koch brothers and the flood of private money in political campaigns with panelists Zephyr Teachout, David Webb, Hari Kondabolu and Ted Alexandro.

David Letterman was joined by Rachel Maddow and Ben Schwartz, plus music from Marty Stuart.

Moshe Kasher, Michelle Wolf and TBA compete to determine who has the funniest take on the day's pop culture.

Host: Whitney Cummings; Guests: Kat Dennings, Beth Behrs, and Rhea Seehorn

In the remote Arctic town of Fortitude, two children make a remarkable find, while the discovery of a horrific crime brings a new arrival to the island that complicates Sheriff Dan Anderssen's investigation.

Henry begins his new life, but Freddie marks out the battle lines - can they ever be friends, let alone anything more? Lance tries to work out where Henry's gone, and enlists Cleo's help, but only Cliff is devious enough to work out the truth - and when Henry's workplace becomes a battleground, the stakes are raised higher than ever.

A hen party on the island ends in tragedy when the bride-to-be is found dead in her bath the following morning. It doesn't take long for Humphrey to work out she was murdered - and when the electronic key proves she was the last person to open the door, it looks like she knew her killer. But why was the body in the bath? Meanwhile, Camille has a big decision to make.

In the remote Arctic town of Fortitude, two children make a remarkable find, while the discovery of a horrific crime brings a new arrival to the island that complicates Sheriff Dan Anderssen's investigation.

Scotty sees Yvonne and believes it is love at first sight, however it soon becomes an obsession and her life begins to spiral out of control.

When Crazy Day arrives, Raven tries to avoid being driven crazy by her fellow teammates.

Steven learns that Garnet can see into the future and becomes curious about the possible dangers that lurk around him.