The team has to protect Ziva's father when he attends the NCIS conference, which has Ziva confronting her past when a couple of unexpected surprises occur.

The gang gathers at Nathan and Haley's to spend Thanksgiving with friends and family.

After Mr. Schuester gets sick, a substitute teacher takes over the Glee Club and becomes a new love interest and competition for Will.

With Kyle Massey & Lacey, Brandy & Maxsim, Bristol Palin & Mark and Jennifer Grey & Derek up for elimination, the pressure is on because all the dancers are amazing in their own little ways. Who will be going on towards the finals and who will go back to being just themselves?

Jim's secret identity is at risk when he tries to take down a dangerous mobster who has eluded George for years; Stephanie continues to look into Dr. Volson's previous research of a mysterious plant - against Dr. King's wishes; Daphne convinces a reluctant JJ to use his powers to help her become more knowledgeable in order to impress a boy; and JJ goes to extreme measures to help Katie get a date.

This week, the competition moves to singles, so contestants will compete on their own without partners or teammates from this point forward. The most recent elimination is still a big topic of conversation, with trainer Bob Harper trying to determine why the vote went the way it did and one player still upset over the departure of a close friend. But the players all perk up with news from the trainers that they're getting a special gift from loved ones - heartwarming videos from home that move everyone to tears. When one player doesn't receive a video, the other contestants thoughtfully plan an uplifting surprise to try and make up for it. Then a pool challenge tests everyone's balancing skills, and later, one player reaches a milestone at the weigh-in. Finally, one more contestant is eliminated, and heads home to an emotional reunion with loved ones.

With Christmas and Ruby's first birthday fast approaching, the Rafter family struggle to get back on track.

Dated to the late Stone Age, Stonehenge may be the best-known and most mysterious relic of prehistory. Every year, a million visitors are drawn to England to gaze upon the famous circle of stones, but the monument's meaning has continued to elude us. Now investigations inside and around Stonehenge have kicked off a dramatic new era of discovery and debate over who built Stonehenge and for what purpose. How did prehistoric people quarry, transport, sculpt, and erect these giant stones? Granted exclusive access to the dig site at Bluestonehenge, a prehistoric stone circle monument recently discovered about a mile from Stonehenge, NOVA cameras join a new generation of researchers finding important clues to this enduring mystery.

Mike learns how to install a lightning rod on a home in Lucedale, Miss. and asks Barsky questions about lightning.

Paul has a breakthrough in trying to get Jesse to connect with his birth parents.

When a murdered antiques dealer's book of top-secret information goes missing, Hetty sends the NCIS team on a mission to find it.

Simeon makes his escape from Destiny, sending Nicholas Rush on a vengeful mission. But Young and Greer attempt to retrieve Simeon unharmed.

Baze and Emma attempt to sign a high-profile client, Candy, who only has eyes for Baze. Lux goes to her homecoming dance hoping to see Eric but the evening takes an ugly turn for the worse. Cate explores Lux's past and is shocked at what she discovers.

When Hope starts imitating the dogs at her day care, Jimmy decides to enroll her in an expensive, high-end center. But the blemish on Burt's record needs to be expunged before Hope has any chance of getting accepted. However, when trying to turn Burt's past around the rest of the family ends up in a bind of their own and must pull together to straighten things out with the law.

Paul opens up about his lack of passion.

While the club's on a man hunt, Jax faces the toughest decision of his life.

Alicia is on the road to successfully arguing that her teenaged pop star client, Sloan, is innocent of a DUI, until Cary drops a bombshell that could ruin the starlet's career and life. Meanwhile, Peter's campaign hits a snag when the Democratic Committee tells him to drop out of the race.

Sarah convinces Amber to meet with an important colleague of Gordon's. Meanwhile, Kristina frantically attempts to obtain a birthday invite for troublesome Max. Camille takes a class with the man she once had an affair with, making Zeke jealous. Elsewhere, Crosby and Joel band together to direct Jabbar's school play. Haddie's relationship with an unexpected love interest deepens.

Fitch, Washington and Sanchez investigate a missing teenager, Seth Cantor. Everything points to his high school buddies who are running drugs from across the Canadian border. The crime seems to copycat the style of the Purple Gang, an old Detroit mob - indications of a violent murder without a body. Longford and Majahan's case involves a murdered high stakes poker player

Bethany McLean & Joe Nocera

Harrison Ford, Rosario Dawson, Reggie Watts

John Legend

Rapper Jay-Z; chef Jamie Oliver; Rihanna performs

Julianne Moore, Tom Felton, Nelly

The Prince of Wakanda has been stalking the Avengers for weeks, and now the Black Panther strikes! The Panther wants the Avengers help in taking back the throne of Wakanda from the vicious Man-Ape. The problem is, they have to go through the Wakandan army, HYDRA, and Klaw to do it.

Kevin meets Bill Bradley and his wife Sarah who intend to built not one but two timber houses in south London on the site of Bill's former wood workshop.

The remaining candidates travel to Pinewood Studios, where the team teams learn that their next task is to create personal movie experiences and sell them on to customers at a large London shopping centre. One of the candidates from the loosing team is fired by Sir Alan at the end of the show.