Iris is escorted by Barry to a university gathering, honouring Simon Stagg, a famous scientist. When six gunmen interrupt proceedings, Barry changes into the Flash only to pass out. While the scientists try to discover what's wrong with Barry, they realize that they're dealing with a metahuman who can replicate himself. Meanwhile, Iris becomes intrigued by the mysterious red streak fighting crime in Central City.

Henry and Eliza discover that their most valuable office relationship might be their own after Saperstein mandates his employees to work on their interpersonal connectivity.

The Secretary of the Navy assigns the NCIS team to a joint terrorism task force after a Naval research scientist is murdered and the lead suspect is wanted by the Russian government. In order to get a jump on the case, Gibbs has DiNozzo run interference with the leader of the task force, FBI Agent Leia Pendergast. Stephanie Jacobsen guest stars.

The battle rounds begin and the coaches enlist the help of the music industry's top recording artists to offer their knowledge and skills as advisers. Adam Levine teams up with Stevie Nicks, Blake Shelton with Little Big Town, Pharrell Williams with Alicia Keys and Gwen Stefani with husband Gavin Rossdale. In this phase, the coaches pit two of their own team members against each other in a dueling duet. After the vocal face-off, each coach must choose which artist from their team is the strongest, and has the option of stealing losing artists from an opposing coach. Each coach has two steals during the battle rounds where their artists will proceed to the new knockout rounds. Carson Daly hosts. (1-hr).

Dana and Peter seem to have reached the perfect relationship balance - they've jointly agreed to see other people but not talk about it. But their dating anonymity is all about to change when Dana learns of a long-standing dinner party Amy is hosting at the loft - and the fact Peter is attending and bringing someone else as his date. On a mission to find her own suitable dinner companion, Dana turns to her new handsome and British boss, Tucker, but both Peter and Dana's evenings do not go as planned.

While on a mission to learn more about the secrets of the mysterious writing, Coulson finds himself attacked by the only person he can trust: Agent Melinda May. The rest of the team is trapped in an explosive situation, and it's up to Fitz to save them.

After returning from a romantic two-week island vacation, Jake is all set to pop the question on bended knee, but before he can ask, Annie lets loose on Jake for his inability to commit. Annie tries to make amends with a proposal of her own but the comedy of errors continues. The only thing we know for sure is that these two are destined to be together - whether they can get it together or not.

A Navy SEAL is found murdered in a sorority house, and the NCIS team investigates to determine if the motive pertained to one of his classified missions or whether the death was the result of collegiate foul play. Pride's daughter visits the NCIS office.

Crowley notices Dean is becoming more and more aggressive. Dean tells him that's the side effect of being a demon, but Crowley knows it's something more - the Mark of Cain needs to be fed. Meanwhile, Sam is captured by Cole, an angry man who blames Dean for his father's death years ago and wants revenge. Cole tortures Sam, hoping he'll tell him where Dean is hiding. Hannah sees how weak Castiel is becoming as his grace continues to fade, so she makes a bold choice and asks Metatron for help.

When Coach's liaison with the school nurse gets messy, vice principal Jess must enforce a new, "no fraternization" policy among the teachers. But the tables soon get turned when she finds herself attracted to the hot new science teacher. Meanwhile, Nick is enjoying being Schmidt and Winston's secretary, after the loft gets a new home phone.

Tanner, Adam and Rutledge select a competent driver each and then compete in a series of different, and increasingly out-there races.

With the semifinals around the corner, the artists must take inspiration from disaster scenarios and craft elemental fairies born from each one.

Will returns to San Francisco to sort out his finances after a surprising royalty check. Andy reveals to him that his wife Laurie might be pregnant and he needs Will's help to find out. Meanwhile, Marcus's new "friends" don't sit well with Will and he attempts to convince Fiona that the kids are up to no good.

Mindy attempts to improve the practice's image in an effort to impress the hospital's new head of obstetrics.

What looks like a drug overdose death of a reformed junkie-turned community activist results in Henry and Jo tracking a murderer. The complex investigation involves dirty dealings between a real estate developer and a community organizer with millions of dollars at stake. Henry flashes back to the same 1890s New York tenement where he worked as a doctor to help the poor, including an orphan boy who gives him a special handmade gift. Meanwhile, Abe cooks up a Sunday dinner feast for Henry, Jo and himself. When Jo tries to find out how the two men know one another, Henry weaves an elaborate tale to cover the truth.

The pressure is on when the Artists take on Oliver's specialty- and it's tripled when they have to work in teams. Blame is the name of the game.

Jax takes advantage of shifting alliances to protect the MC and settle a score.

Two barely literate rappers try to rhyme; football coach Lane Kiffin fails again; Daniel explores the sensual side of escalators.

When a young brother and sister witness a gangland shooting, they take a half million in drug money and go on the run. Reese goes looking for the team's two new Numbers and finds the Brotherhood after them. Meanwhile, Finch turns to Elias for help.

Things get crazy at the senior bonfire; Jenna and Tamara announce the boys' girl-rating tradition to the rest of the school.

Dawson starts her first day as a candidate and looks to find a balance with Lieutenant Casey inside the firehouse. Mills must come to terms with a future that doesn't include the squad. Meanwhile, Severide confronts his demons in an unexpected way and the Molly's crew has a date with the city inspector to make sure their food truck is up to code.

Karma, Lauren and Shane battle it out for a place in Hester's drama club. Amy gate crashes a party being held in Liam's mansion.

Denzel helps Steve launch a career as a gay country music star; a granted wish turns Malloy into a full-size bear.

Lucy and Ian must pass character training together to continue getting paid, and with a looming eviction Lucy is highly motivated Ian however is not.

Zach Galifianakis

Jennifer Garner, T.J. Miller, Shakey Graves

Neil Young

Tonight Jimmy's guests are actress Emma Stone and actor Logan Lerman. Musical guest will be singer-songwriter Sam Smith.

Michael Keaton, Foo Fighters

Justin Willman, Jonah Ray and Mamrie Hart compete to determine who has the funniest take on the day's pop culture.

Seth was joined by Dane Cook, Troy Polamalu and Azar Nafisi.

James Marsden, Kristen Schaal

Once again taking over the Bake Off tent, Mary and Paul tackle the signature, technical and show-stopper challenges from the second half of the series.

t's a fresh new term and dynamic headteacher Vaughan Fitzgerald and his family arrive at Waterloo Road and attempt to fit into their new lives. Darren's world falls apart after a shocking incident at home and George learns never to cross a member of the Barry family.

A brand new family arrive at Waterloo Road and immediately shake things up both in and out of the classroom. Dominant and forward-thinking, Vaughan Fitzgerald has all the makings of the dynamic headteacher the school needs, while his confident partner Allie takes the reins of the art department. But their professional veneer just might be tested as their warring children's behaviour threatens to spill out into the classroom.

Christine vows to help Darren with his desperate situation at home but neither are prepared for the shocking scene that awaits when they try to confront his mother. George has been bled dry by Carol over the summer and pledges to make a change. He soon finds out why no one messes with a Barry and gets away with it.

Andy and Nicki Bruce try to build an experimental flood-proof floating house on an island in the River Thames. But building such a complex design on a site with limited access is not easy.

Andy and Nicki Bruce's amphibious house, the first of its kind in the UK. Their architect has come up with an ambitious, experimental design that has never been tried on a river bank in Britain and no one knows whether it will work.

The Bruces decide to build on a site on a small island in the river. But it's not long before the project becomes bogged down in the logistical challenges of building such a complex design on a small island that is only accessible by a narrow footbridge.

Alan Sugar summons the candidates to Imperial College London, where they discover their next task - to design a piece of wearable technology. It needs to combine fashion with cutting-edge kit, and after creating their prototypes, they will be pitching their products to retailers. It's boys versus girls again, and while one team comes up with a hi-tech jacket, the others work on a sweatshirt-cum-video camera. However, when sales day arrives, it's touch-and-go whether one group will have a product at all, while a slip of the tongue threatens to ruin a pitch - two errors that surely won't be forgiven in the boardroom.

Troubled by Gill's comments about her relationship with Will Pemberton, Rachel gets cold feet about accompanying him to an awards ceremony. When Janet discovers that Elise's heart is being broken by Eleanor's son, her maternal instincts make her want to rescue her daughter and bring her home. When a couple are shot at close range in their pub in the early hours, their son Simon feels utterly alone, having lost his sister Carla when he was three. But when his aunt is identifying the bodies, she tells them that Carla did not die, but was disowned by the family after failed attempts at rehab.

Under pressure to hit targets, Karl and George are on an ill-fated stakeout, whilst Natalie resorts to teaching Bryony dubious new work skills.