As Barry and the team at S.T.A.R. Labs work to capture Kyle Nimbus, a.k.a. The Mist, a dangerous new meta-human with toxic gas powers, they revisit the painful night the particle accelerator exploded and killed Caitlin's fiancé, Ronnie. Meanwhile, Joe decides to finally visit Henry in jail after all these years, but things take a dangerous turn when Kyle shows up looking to punish Joe for arresting him years ago. Meanwhile, Iris and Eddie continue to hide their relationship from Joe.

Eliza accepts Henry's challenge to do something helpful over the weekend and reluctantly offers to babysit Charmonique's young son on a Saturday night. Little does she know that young Kevin has a lot to teach her about having fun.

During a joint Coast Guard and NCIS training exercise at sea, Gibbs and CGIS Agent Borin spot a deceased man overboard, who is discovered to be a missing crew member from a ship 60 nautical miles away. Upon boarding the ship for questioning, Gibbs finds himself on a vessel that has been commandeered by pirates. Diane Neal guest and Jim Beaver guest star.

The fourth round of battles get underway.

Peter and Dana's plans go awry when their reservation is pushed. Amy and David make a huge decision.

When Skye's father refuses to help her, Raina is forced to threaten Jemma's cover unless Coulson helps her recover the obelisk. When he refuses, Jemma is forced to turn to an unexpected ally to make her escape.

Jake moves into Annie's apartment and she begins to feel the pinch of having to share her space with someone. She confesses her claustrophobia to her dads Kevin 1 and Kevin 2 but her stress continues to mount. Meanwhile, Gil discovers an all-you-can-eat buffet where he can eat for one low price all day - as long as he never leaves the restaurant.

The NCIS team is given a 22-hour deadline after the murder investigation of a Chief Warrant Officer who specialized in counterintelligence reveals his wife had been kidnapped and is being held for ransom. Fornell travels to New Orleans to assist with the case.

Sam tries to cure Dean using injections of sanctified blood, but Dean insists that he doesn't want to be cured... and the attempt may kill him. Meanwhile, Crowley discovers that his recent sojourn with Dean has undermined his authority in Hell, and Castiel gets help from an unexpected ally.

The Appalachian Trail spans 2,168 miles from Maine to Georgia, and takes 3 to 6 months to hike. But what if you don't have that kind of time? Tanner, Rutledge and Adam are given the monumental task of driving a road-based version of all 14 states on the trail in just 1 day. With just 24 hours to complete their task they barely have time to stop and must come up with all sorts of ideas to save time.

The four semifinalists conquer giant city-crushing monstrosities in order to crush their way straight into the finale.

Could the darkest recesses of our planet contain important information left by our ancient ancestors? And within Earth's mysterious caves, might we find evidence of otherworldly contact? Throughout human history, some caves have been considered sacred places for spiritual encounter and enlightenment, while others have been feared as true portals to purgatory. What happens in these subterranean spaces that has the power to influence religions around the globe? Could some of Earth's deepest caverns be secret conduits to supernatural realms? In Charma, India, archeologists recently discovered 10,000 year-old prehistoric artwork of what appears to be extraterrestrial beings. Could these paintings be a visual record of alien encounters in the distant past? Or might there be knowledge actually stored within the crystals and minerals that cover the walls of caves, as some Ancient Astronaut theorists suggest?

Will is told to sell his San Francisco home in order to solve his money issues. So he decides to find Marcus a brand new best friend.

When a human heart is delivered fresh out of a body to the homicide division, Henry and Jo end up in the middle of a Jack the Ripper copycat murder investigation. But it doesn't stop there. A second killing resembles another infamous, unsolved crime: the Black Dahlia murder. Henry has seen it all before, as flashbacks show his involvement with the two original cases from two very different periods of his long life. However, Henry's anonymous caller tips him to search beyond the clues of these classic killings and leads the police squad to profile a very different, yet disturbed suspect.

The artists must scrimshaw walrus penises and face their pickiest canvases to date; one artist loses their cool and another is eliminated.

In order to undermine a powerful club enemy Samcro makes an unlikely partnership.

Daniel checks up on the subjects of past Web Redemptions, a driver hits a little girl riding her bike, and Daniel introduces the Tosh.0 credit card.

Finch is suspicious when a gifted political pollster's number comes up at the same time that his typically ironclad predictions go wrong, and believes that the two events are linked. Reese is sidelined by a direct order from Moreno.

The battle of the sexes erupts again; Tamara and Jenna's "Dude Database" goes viral; a revealed secret causes friction between Jenna and Tamara.

Lieutenant Casey deals with the fallout of his sister Christie's impending divorce. Meanwhile, Dawson and Mills settle into their new roles at Station 51. Elsewhere, Brett can't decide if she wants to leave Chicago and the Molly's crew still can't figure out how to get the food truck started.

Amy plans a scavenger hunt to celebrate Karma's sixteenth birthday.

The Secretary of the Interior visits Brickleberry and demotes Woody; Denzel becomes a new man after he gives up smoking weed.

At an employee only night in Happyland, Lucy is on an emotional rollercoaster after catching Harper with Ian. Though her attempts to repair her Happyland family fail, a new crush Noah might take the pain away.

Dana Carvey, Cristin Milioti, Gary Gulman

Pierce Brosnan, Krysten Ritter

Waterloo Road opens its doors to the local community but the message of goodwill falls on deaf ears for some. Rhiannon provides more than a shoulder for Darren to cry on and Justin's behaviour continues to escalate.

Vaughan rolls out his first initiative at the school: the Waterloo Road community hub. The phone is soon ringing off the hook with people who need help and the whole school gets behind the project. All except for Shaznay and Lisa who quickly realise they can use this as an opportunity to help themselves.

Darren seeks comfort in Rhiannon's arms as he mourns the death of his mother but when Maggie gets wind of their night-time antics, she swiftly nips it in the bud. However, she worries that it's too little too late when Rhiannon grows cagey about how serious they've become.

Justin's anger continues to spiral out of control but the person whose attention he craves the most refuses to accept the severity of the situation, leading to the shock resignation of one of the teachers.

Kevin McCloud returns to a remote part of France and a restoration project of a dilapidated manor house started back in 2003 by Denise Daniel and Doug Ibbs.

When Denise Daniel and Doug Ibbs gave up everything in the UK to start a new life in a remote part of central France, they couldn't have known what was ahead of them.

Most people would have regretted falling in love with a massive, dilapidated manor house with just four crumbling walls and half a roof, but not Doug and Deni.

This impressive, extraordinary and utterly determined couple rolled up their sleeves and slogged away day and night, doing everything themselves, year after year, until slowly but surely they created a magnificent edifice out of the ruins they bought off the internet.

The remaining candidates pay a visit to the Royal Exchange, home to some of the biggest names in luxury goods. The two teams are informed that hottest trends in retail by creating their own range of home fragrance products. At the end of the show another candidate is fired by Lord Sugar.

Janet is unnerved to discover that DSI Dodson cannot ignore her concerns about Gill's drinking. Just as Rachel feels as if she is getting to grips with the job, she makes a fatal error that puts Janet and Chris in danger. When a man's body is found wedged between rocks on the moors with nothing to identify him, a road block is set up and an appeal put out. Enquiries lead Janet and Chris to a nearby farm, but they discover something much more sinister and shocking than they could ever have anticipated.

Security guards Janette and Paul make unlikely heroes when Trish loses her mobile phone and Natalie gets in big trouble with a jobseeker.