The participants meet in the streets of Vermont for a celebration featuring appearances by Trista and Ryan Sutter, Hannah Storm and Ashley Brewer; Ruthie Collins performs; the singles move into the villa.

SERIES PREMIERE

(Originally Aired: Tuesday Feb 13, 2018)

Stars of iconic romantic movies share behind-the-scene secrets and memories.

(Originally Aired: Tuesday Feb 13, 2018)

In figure skating, coverage features the pairs’ short program. Plus, Mikaela Shiffrin begins her title defense in women’s slalom and Shaun White targets a third Olympic snowboard halfpipe gold medal.

(Originally Aired: Tuesday Feb 13, 2018)

Amunet threatens to kill Caitlin if she doesn’t help perform a tricky medical task; The Thinker traps The Flash in a speedster-proof prison; Iris is forced to choose whether to save Caitlin or Barry.

(Originally Aired: Tuesday Dec 05, 2017)

An unexpected phone call prompts Jefferson to investigate the murder of his father; Anissa wrestles with the fact that her actions have dire consequences; Jennifer learns the importance of controlling her temper.

(Originally Aired: Tuesday Feb 13, 2018)

A man searches for the stranger who comforted him on Sept. 11; a man hopes to thank a fellow chaplain who helped him carry on.

(Originally Aired: Tuesday Feb 13, 2018)

The 1920 bombing in Manhattan’s Financial District that left 38 dead and launched the career of J. Edgar Hoover remains unsolved.

(Originally Aired: Tuesday Feb 13, 2018)

Killings linked to the MS-13 gang and the crackdown that led to the unlawful detainment of some immigrant teens.

(Originally Aired: Tuesday Feb 13, 2018)

Police are called to the scene when a situation escalates; a young woman dances at a local strip club to finance her heroin habit; David and Kiersten’s relationship comes to a dramatic head; Angela quits heroin cold turkey.

(Originally Aired: Tuesday Feb 06, 2018)

Taylor’s mother makes a disturbing discovery; Angela’s frustration with her ex-husband challenges her ability to stay clean; Kiersten attempts to reconcile with her parents, but her heroin use stands in the way.

(Originally Aired: Tuesday Feb 13, 2018)

The adult participants at Highland Park High School focus on teen pregnancy, sex education and teenage mothers.

(Originally Aired: Tuesday Feb 13, 2018)

Lisa Rinna returns to her roots on “Days of Our Lives”; Lisa Vanderpump receives news about the lawsuit, but Kyle and Dorit do not react to it the way she hopes; Kyle and Lisa Vanderpump address their latest issues in front of everyone.

(Originally Aired: Tuesday Feb 13, 2018)

Dorit reveals to Erika what was said about her after her unexpected departure; the ladies descend upon New York for Fashion Week; Lisa Rinna helps her daughter get settled in New York City; private information about Lisa Vanderpump goes public.

(Originally Aired: Tuesday Feb 13, 2018)

With construction underway, Fredrik and Bethenny search for their next investment property; Fredrik’s choice of apartments and upcoming travel plans make Bethenny question how serious he is taking their new venture.

(Originally Aired: Tuesday Feb 13, 2018)

Highlights from the past two seasons of “The Real Housewives of New York City,” including Bethenny’s return, Luann’s quest for love, Sonja’s financial woes, Carole’s romance, Ramona’s dating life, and Dorinda’s introduction to the friends.

(Originally Aired: Wednesday Mar 15, 2017)

A tribute to the first woman to fight in the Revolutionary War and receive a pension; a museum curator who saved art from the Nazis; Civil War hero Clara Bart.

(Originally Aired: Tuesday Jan 23, 2018)

Taran Killam, Jerry O’Connell and Bob Odenkirk explore the lives of Jack Parsons, occultist cofounder of the Jet Propulsion Lab; W.C. Minor, the man who helped write the Oxford English Dictionary; Rasputin, adviser to Tsar Nicholas II of Russia.

(Originally Aired: Tuesday Jan 30, 2018)

(Originally Aired: Tuesday Nov 03, 2015)

The early history of Hip hop; Berry Gordy, the man known for inventing Motown; Nichelle Nichols’s activism both on and off the TV screen.

(Originally Aired: Tuesday Feb 06, 2018)

A salute to Margaret Sanger’s crusade for accessible birth control; the creation of the Kinsey scale; Gloria Steinem’s undercover work at The Playboy Club.

(Originally Aired: Tuesday Feb 13, 2018)

Lillian and Beatrice fight over a sexy Spanish meteorologist; a boat trip provides an opportunity for Dodo and Peepers to rekindle their illicit romance.

(Originally Aired: Tuesday Feb 13, 2018)

Josh embarks on a harrowing cross-country delivery; rain threatens the final run of a special seasonal shine recipe; America’s first “shiner in chief” inspires a top-dollar batch of malted rye whiskey; with added facts and extra scenes.

(Originally Aired: Tuesday Feb 13, 2018)

Josh must make good with a biker gang after a trailer fire leaves them empty handed; Tickle’s first run of legal rye whisky tempts him to return to the illegal side; in Louisiana.

(Originally Aired: Tuesday Feb 13, 2018)

Mark Rogers heads into the mountains of Appalachia to track a black bear and to dig for ginseng to infuse with moonshine.

(Originally Aired: Tuesday Feb 13, 2018)

Luck is not on the competitors’ side as they open the first basket to find not duck breast, but a more formidable foe: duck tongue; a bitter juice and a pretentiously presented American classic challenge the chefs in the entree round.

(Originally Aired: Tuesday Dec 12, 2017)

The chefs create dishes for the Chinese New Year; they create appetizers using one of Americans’ favorite Chinese dishes; there’s a giant fish in the basket for the entree round; the chefs must include an oversized cookie in their desserts.

(Originally Aired: Tuesday Jan 26, 2016)

The pastry experts battling it out in the kitchen learn they must make candy, cake and ice cream in an all-desserts challenge.

(Originally Aired: Tuesday Feb 13, 2018)

Stef’s mother comes to visit and helps Stef cope with a tough time; Callie and Jude grapple with the memory of their biological mother.

(Originally Aired: Tuesday Feb 13, 2018)

A water boy’s (Adam Sandler) temper tantrums spur an addled football coach (Henry Winkler) to sign him on as defensive tackle.

(Originally Aired: Thursday Jan 01, 1998)

Chip incorporates a San Joaquin Valley earthiness into his clown routine.

(Originally Aired: Tuesday Feb 13, 2018)

Christine brings the celery.

(Originally Aired: Tuesday Feb 06, 2018)

The discovery of the mysterious lead cross raises new questions about a Knights Templar connection; a look at Templar history and the compelling Templar clues the team has found so far.

(Originally Aired: Tuesday Feb 13, 2018)

On the trail of The Angel of Death, Tim and Mike investigate a key Nazi support point in Uruguay; Mike and Lenny review newly declassified Chilean files that reveal a secret plot to attack the United States.

(Originally Aired: Tuesday Feb 13, 2018)

Javi balances being a single dad half the time and deciding if he should start dating again; the possibility of future deployment leads him to throw himself into a crossfit competition while trying to build a happy life.

(Originally Aired: Tuesday Feb 13, 2018)

When the mysterious and offensive notes continue to circulate the Challenge house, they cause a stir among the female competitors and the culprit finally gets revealed; when four Challenge legends return, the game turns upside-down.

(Originally Aired: Tuesday Feb 13, 2018)

Chanel and Sterling; “World War Bee”; “Backflip Block”; “The Wheel World.”

(Originally Aired: Friday Sep 01, 2017)

Mark Cuban; “Mark Tank”; “Cuban Bathroom Crisis”; “Dangers of Dunking.”

(Originally Aired: Friday Dec 01, 2017)

Garcia was the head of a deadly heroin ring in the Bronx; Henao led an ecstasy drug ring out of the Netherlands; Sandra Avila Beltran was a Mexican drug cartel leader.

(Originally Aired: Tuesday Sep 25, 2012)

The 2010 film “The Social Network” is scriptwriter Aaron Sorkin’s story about Facebook, but Facebook’s founder, Mark Zuckerberg, says everything in the movie is false.

James `Whitey’ Bulger is one of the most notorious organized crime bosses in American history, not only for the murders he committed but for turning the FBI into his informants; Bulger wreaked terror on his own Boston community for decades.

(Originally Aired: Tuesday Dec 06, 2016)

Researchers investigate a strange glowing lake reported to turn things into stone; a structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.

(Originally Aired: Tuesday Feb 06, 2018)

A mysterious Stonehenge-like structure in Russia may have links to the Nazis; experts uncover clues to a mega-tsunami with the power to devastate the United States; a huge lake appears in the Sahara overnight.

(Originally Aired: Tuesday Feb 13, 2018)

Mercury is a deadly world, facing attacks from the Sun, comets, and other planets; even though it’s the smallest planet in the solar system, Mercury has a dangerous secret that may one day threaten life on Earth.

(Originally Aired: Tuesday Feb 13, 2018)

Monica and Rachel’s grumpy downstairs neighbor (Larry Hankin) dies and leaves all his belongings to the girls.

(Originally Aired: Thursday Oct 05, 1995)

Joey and Chandler decide to baby-sit and use Ben as a way to pick up women; Phoebe loses her job singing at Central Perk.

(Originally Aired: Thursday Nov 02, 1995)

A drunken Rachel leaves a phone message for Ross that may change their relationship; Chandler regrets asking Monica to help him lose weight.

(Originally Aired: Thursday Nov 09, 1995)

The coaches must lead by example when they’re forced to tattoo the under chin in a Master’s Faceoff; the artists’ adaptability is tested with undead tattoos.

(Originally Aired: Tuesday Feb 13, 2018)

Sheldon feels pressured to participate in romantic traditions when the gang re-creates a high-school prom on the roof.

(Originally Aired: Thursday Nov 06, 2014)

Leonard has minor surgery on his nose, causing Sheldon to overreact; Bernadette and Howard work on their marriage.

(Originally Aired: Thursday Nov 13, 2014)

Sheldon says goodbye to Fun With Flags; Howard, Leonard and Raj look through their dead professor’s research; Bernadette learns her co-workers’ true feelings.

(Originally Aired: Thursday Nov 20, 2014)

Leonard and Wolowitz clash over a work emergency; Amy throws a Victorian Christmas party which Sheldon resents.

(Originally Aired: Thursday Dec 11, 2014)

When the guys agree to do something the girls like, Sheldon and Leonard end up having a confrontation.

(Originally Aired: Thursday Jan 08, 2015)

Edie goes undercover as an assistant coach of Jared and Delilah’s hockey team, and when they go on the road together, Robin suddenly gets jealous of this mysterious stranger.

(Originally Aired: Tuesday Feb 13, 2018)

The guys pose as inhospitable restaurant hosts, then beg strangers to babysit their grandfathers; the longest punishment in the show’s history.

(Originally Aired: Thursday Apr 07, 2016)

The guys are hit with some bad reception while working behind a desk; the guys head to the park where they ask strangers for advice on their questionable life choice; tonight’s big loser is tasked with taking photos of a water aerobics class.

(Originally Aired: Thursday Feb 09, 2017)

Murr, Sal, Q and Joe pose as TV execs pitching insane shows; the night’s big loser undergoes a psychic reading that puts his real life on the wrong track.

(Originally Aired: Thursday Apr 06, 2017)

Sal, Murr, Q and Joe convince shoppers to repeat odd catch phrases; going mental as psychoanalysts; the evening’s losers perform at a halftime show.

(Originally Aired: Thursday Apr 13, 2017)

Kevin and Brooke learn that poo on the shoe is not good luck; Brooke tests some hacks for her pup; the coldblooded hacker tries to swipe some bling.

(Originally Aired: Tuesday Feb 13, 2018)

Learning why so many people are born on October 5; a 1950s actress inspires Brooke’s Lazy Cook getup.

(Originally Aired: Tuesday Feb 13, 2018)

The models take part in LA Pride week as they walk designer Christian Cowan’s rainbow runway and vogue it out with RuPaul’s “Drag Race” fan favorites Valentina, Katya and Manila in a glamorous queens versus princesses photo shoot.

(Originally Aired: Tuesday Feb 13, 2018)

Passionate, heartfelt and shocking moments from the series’ couples.

(Originally Aired: Monday Feb 12, 2018)

(Originally Aired: Monday Feb 12, 2018)

The case of Jesse’s disappearance appears to be close to being solved, but Annie is skeptical.

(Originally Aired: Monday Mar 13, 2017)