The NCIS team comes to a surprising discovery while investigating the shocking murder of their own team member.

The three remaining finalists take the stage to perform LIVE for the nation! After the performances, it is once again up to America to vote.

Teddy seeks revenge after learning that Spence tried to bribe Silver; Liam and Annie share their darkest secrets; Ryan receives a mysterious package.

In the results night it will be revealed, which three Celebrities and their Pro-Dancer partners will advance to the Finale.

The players train for a marathon at home and must work to stay on track while away from the ranch. During the race, the contestants receive support from former players and family members. Later, Bob and Jillian hold last-chance workouts before the weigh-in, which determines who's moving on to the final round.

Locke gains a new follower and goes to confront Widmore. Meanwhile, Jacob meets with the candidates and one of them must choose their destiny. And in another life, Locke makes a decision while Desmond gathers the others.

A white knuckle, boat-crippling passage stands between the Time Bandit and their final offload. A maniacal skipper continues to risk mutiny in the far northern reaches of the Bering Sea. Meanwhile, Captain Phil has to deal with an major engineering glitch that threatens Cornelia Marie's entire King crab catch.

After Callen's cover is blown and compromises the unit, the NCIS team races to find out who is behind the security breach.

Will's high school rival, special guest star Neil Patrick Harris, returns to McKinley to bring down the glee club. Elsewhere, Artie's dreams are exposed.

Four men who have been friends since high school discover they're being blackmailed over the death of another childhood friend. When one of the four turns up dead, it's up to Nichols and Stevens to uncover the truth behind a 22-year-old mystery.

Spencer and Heidi upset everyone else. Kristin and Brody might have a thing for each other.

Eli Gold works on getting Peter's charges dropped, and Alicia defends Colin Sweeney, a client and accused wife killer, who claims self defense after she finds him handcuffed to a dead woman.

A family walk for autism is jeopardized when Sarah and Adam fight over Haddie's behavior. The secret anger between Haddie and Amber comes to a head and divides the family in two. Elsewhere, Julia trying to help Zeek out arranges a dinner meeting for him. Meanwhile, Crosby is at risk of losing Jasmine to New York after she auditions for a dance company.

The episode opens with the V soldier still on the hunt for Val, while for her part, Val's water breaks and her baby with Ryan will soon be born. Meanwhile Erica, tired of being on the defensive, decides to go on the offensive and gets herself and Tyler invited up to the Mothership for a get-to-know-everyone-better dinner.

When more dirty secrets about his father, Arlo, is revealed to him, Raylan understands Arlo has made a powerful enemy named Bo and needs Raylan's help if there is any hope of survival.

Reports of encounters with strange beings and sightings of mysterious objects in the sky have occurred throughout history. A 13th century historical book, Otia Imperialia, includes an account of a creature descending from a flying craft over Bristol, England. The log from Christopher Columbus' first voyage to America contains a report of strange lights in the sky. Medieval art pieces depict disc-shaped objects floating in the heavens. Sightings of flying cigar-shaped crafts were reported during the Black Plague. And there were even discussions of extraterrestrial life among America's Founding Fathers. Could these sightings, coming from every part of the world, from biblical times to present day, be evidence that aliens have been with us all along?

Erin and Olivia bump heads on how to dress Fergie for an ELLE cover shoot. Meanwhile, Whitney is torn when a French photographer wants to take the relationship to the next level.

Jonah Hill; Janelle Monáe; John Carney; Miss USA 2010 presents the Top Ten list.

Michael Douglas, Charles Barkley, Joe Nichols

The two teams were tasked with preparing a 3 course meal for a normal family and judges Matt Preston and Curtis Stone, on a tight budget and time limit. In the end, the families rated each team equally and the judges could not agree on a winner, so the challenge was ruled a tie. Therefore, a bottom 2 was selected from each team,

Mark finds himsef in demand when everyone turns to him for advice on the emergency flood situation. Donna and Maria are stuck in a lift with a critical patient following the power cut. Connie finds her patient going into crisis in theatre. A visiting doctor supports Penny.

When a hacker interferes with air support causing a British missile to hit American forces, Porter is assigned the mission to find the man responsible, a former guidance engineer who was dismissed from the army. However, Porter is kidnapped and taken to a Taliban camp.

Porter's life is in danger when he finds himself trapped in a rebels' base in Pakistan. When he manages to escape, he learns that Hugh Collinson, the man he blames for the fatal hostage extraction of 2003, has arrived in Afghanistan to meet him for a final showdown.