Channel 4 TV listings guide

Today

Documentary following eight volunteers working with the Ann Summers company to create a new vibrator. The contributors, including a 69-year-old grandmother, a twentysomething virgin and a middle-aged divorcee who has never achieved an orgasm, test existing products on the market and find inspiration in their kitchen cupboards for their dream sex toy, hoping the retailer can get it onto shop shelves in time for Valentine's DayDocumentary

Christmas Eve arrives, and a desperate Lol visits Combo in prison. Smell suspects budding actor Shaun is being unfaithful after walking in on his intimate rehearsal with Fay, and all the gang attends his first appearance on stage except Woody, who has been offered a promotion at work that could provide a fast track up the management ladder - a development that could be seen as a descent into mediocrityGeneral Movie/Drama

Beauty-obsessed travel agent Amanda Hughes is introduced to civil servant Debbie Hanson, who has been left blind in one eye and severely short-sighted in the other by a congenital facial disfigurement. The pair learn about each other's attitudes to physical appearance, with Amanda demonstrating her exacting beautification process and Debbie revealing how she and her family have learned to live with her condition. The duo then meet glamour model and former plastic surgery addict Alicia DouvallDocumentary

Anna Richardson puts another overweight family under 24-hour surveillance to scrutinise their eating habits. The Castles from Welwyn Garden City in Hertfordshire cannot understand why they are putting on weight when they eat mum Belinda's healthy, home-cooked food. But the proof of the pudding is in the hours of footage that reveals what they really snack on between meal times, so they are put on a 10-week healthy eating regimen to help them shift the pounds. Plus, office workers test the theory that by putting sweet treats even slightly out of sight, they can be kept out of mindGeneral Education/Science/Factual Topics

Kirstie Allsopp and Phil Spencer help two young couples in their search for homes in Hertfordshire. Newly engaged accountants Liz and Neil are hoping to raise a family near the town of Tring, while in St Albans, married couple David and Claire want to find a place where they can finally settle down, after moving house five times in five yearsDIY

Contestants try to outwit the anonymous banker and guess the contents of mystery boxes to win a big-money prize of up to £250,000. With Noel EdmondsGame Show/Quiz

Financial Times columnist Mrs Moneypenny provides more cash-saving tips and reveals a selection of trade secrets to help people maintain their expensesDocumentary

Iver, Groove and Tula try out ways of making themselves look differentCartoons/Puppets

The friends cannot answer any questions because the sun has made them feel hotCartoons/Puppets

Will and his boss Mr Stein join forces with Karen to form an anti-romance club, while Grace decides to make a sexy video for Leo. American sitcom, starring Eric McCormack and Debra Messing, with a guest appearance by Gene WilderSitcom

Cheryl pleads with Jim to behave himself on St Patrick's Day so that he will be able to sit on the church committee, but her plans are ruined when he gets arrested. Comedy, starring James Belushi and Courtney Thorne-SmithSitcom

Nick Luck presents the latest news, tips and betting features ahead of the first day of Royal Ascot. Coverage begins at 1.45pmSport/Horse racing

A temporary call-screener steals the show with her own brand of no-nonsense advice, leaving Frasier feeling insecure. Comedy, starring Kelsey GrammerSitcom

Niles' girlfriend Mel persuades him to compete against Frasier for the honour of becoming cork master at a local wine club, causing friction in the Crane household. Comedy, starring Kelsey Grammer and David Hyde PierceSitcom

Jane Riddell, chief operating officer of the GoodLife Fitness chain of gyms, goes undercover as a trainee keep-fit instructor, a maintenance worker and a salesperson to find ways to improve the companyDocumentary

The property expert comes to the aid of Elaine Care, a grandmother whose four-bedroom home in Folkestone, Kent, has been on the market for two yearsDIY

Includes news headlines and weatherNews/Weather

The chef continues his course and offers more advice on stress-free cooking. Among the dishes he prepares are sticky pork ribs, a spicy chutney and a chilli chicken with ginger and corianderCooking

The competition begins at the Pendragon Country House in Cornwall, where Nigel and Sharon Reed find themselves under intense scrutiny. The group then heads to the Hamble Retreat in Southampton, where the star-rating system becomes the subject of a heated debate, before a former `Friendliest Landlady of the Year' tries to ease the tension at Grey Cottage, a 160-year-old property in the CotswoldsDocumentary

Clare Balding and Nick Luck present live coverage of the opening afternoon of the five-day festival, featuring races at 2.30, 3.05, 3.45, 4.25, 5.00 and 5.35. With commentary and analysis by Simon Holt, Jim McGrath, Graham Cunningham, Tanya Stevenson and Brian Gleeson, and reports from Emma Spencer, Rishi Persad, Mick Fitzgerald and Gina BryceSport/Horse racing

Homer, Marge and the kids hitch a ride on a train, where they are entertained by a tramp who tells them a series of colourful yarns based on American folklore - all of which feature characters suspiciously reminiscent of HomerAnimated Movie/Drama/Sitcom

The day of the wedding arrives, but things fail to go smoothly for Browning when Joe turns up at the McQueen house to reveal the truth about what happened between the devious doctor and his unsuspecting intern. However, accusations of sexual harassment become the least of the groom's worries when an eavesdropper overhears his apology to Mercedes, and discovers the truth about the role he played in Lynsey's grisly fate. Meanwhile, Tom faces a dilemma as Sienna's grip on the Osborne household tightens, and Patrick is embarrassed by Maxine's outlandish behaviourSoap/Melodrama/Folkloric

Including sport and weatherNational News/General Sports/Weather

A man reveals how he suffered psychological bullying by his female ex-partnerGeneral Arts/Culture

Consumer journalist Harry Wallop presents the first of a two-part programme revealing how to live well for free. Setting himself the challenge of looking good, spending a night on the town and throwing a party without spending a penny, he hears from people around the UK who know how to find a freebie, including bargain-hunter Martha, who landed items for her wedding totalling £26,000, and Jayne, winner of more than £300,000 worth of prizes over 28 years of entering competitionsGeneral Education/Science/Factual Topics

The documentary follows the gifted youngsters during the general knowledge and memory round of the competition to find the UK's brightest young mind. Seyonne, 11, is one of seven from a family of high achievers and mum Maria has high expectations of her, while 10-year-old engineering enthusiast Hugo believes he will breeze through this week's challenges. Leonard Ravi Shankar Buckley, 11, has an impressive vocabulary, but his tendency for theatrics often means he loses focus at the crucial momentGame Show/Quiz

Young lesbian Erica struggles to pluck up the courage to tell her traditional Chinese family about her sexuality, until she meets the confrontational Kate, who makes her realise she can't continue hiding herself away. Drama, starring Gemma Chan and Katie McGrathGeneral Movie/Drama

Part one of two. Dawn O'Porter presents a guide to internet dating, following 25 singletons as they experience the process for the first time, hoping to find partners. Along the way, she reveals how to avoid the hidden pitfalls and highlights the dangers of romance scammers, finding out who lies about what on their profilesGeneral Education/Science/Factual Topics

Short film about the joy and pain of pubertyGeneral Movie/Drama

Daisy Donovan explores popular TV programmes around the world to find out how different cultures are kept entertained. She begins in Brazil amid preparations for the Fifa World Cup in 2014 and the 2016 Olympic Games, finding some extremes of television, from shows that objectify and humiliate women to a bloody version of Crimewatch broadcast during the afternoonDocumentary