Today

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  Mexican Food Made Simple

  Today, 12:45, Channel 5

  The conclusion of the cookery show with Thomasina Miers.

  Tommi begins the programme in Xochimilco, an area in Mexico City famous for its canals. She joins some friends for lunch on board one of the many trajineras (colourful gondola-like boats, once used for transporting goods but today used as floating restaurants). There's nothing Mexicans enjoy more than a big feast with friends and family, and there is even a barbecue on board.

• Law and Order

  Today, 14:15, Channel 5

  The venerable crime drama show, now in its sixteenth series, continues with one of its main characters in mortal danger.

  Having now spawned five separate spin-off shows, tonight's episode proves that the original Law & Order can still pack a punch. Tonight, McCoy's life is in danger when a killer he helped convict orchestrates a bloody campaign of revenge from his jail cell. McCoy struggles to convince the judge that the killer is targeting witnesses who testified against him nine years earlier.

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  The Man Who Shot Liberty Valance

  Today, 14:30, Film4

  This bittersweet western drama was one of honoured director John Ford's last films. It stars John Wayne, James Stewart, Lee Marvin and Lee Van Cleef.

  A fledgling lawyer goes to live in the untamed frontier town of Shinbone, where he immediately makes an enemy of notorious outlaw Liberty Valance. Over the years, with the help of a local rancher, he manages to keep the dangerous gunman at bay - until the two meet up one night on the town's dark streets. A beautiful, wistful elegiac of the American West and the notion of legend versus reality, it is arguably among the best work that Ford, Wayne and Stewart produced.

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  Come Dine with Me

  Today, 17:00, Channel 4 HD

  Four cooks from the Darlington area take turns trying to host the best dinner party as the reality entertainment contest continues.

  The first contestant is Dave, who reveals a distinct lack of manners as well as some weird sleeping arrangements. Suzi's plan is to impress with comfort food as well as a bit of fire breathing. Everyone is looking forward to drag queen Neil's party, but things go horribly wrong in the kitchen. The final dinner is served by Nathalie, who plans to win over her guests by showing them a different side to her character - until someone makes an interesting discovery in her wardrobe.

• Lewis

  Today, 20:00, ITV1

  The sixth series of the police drama continues with a brand new episode called Generation of Vipers.

  Inspector Lewis and his partner DS Hathaway are drawn into a world of virtual bullying when Professor Miranda Thornton apparently commits suicide after her dating video is leaked on to a vicious media blog. Clutched in her hand is a newspaper article about millionaire businessman David Connelly, who had been her nemesis for the last couple of years as he proposed to buy up much of her college's land for housing development. However, Lewis does not believe that Thornton's death was suicide.

• DIY SOS: The Big Build

  Today, 20:00, BBC One HD

  The ever-popular home renovation show heads north of the border to Dumfries in Scotland.

  Nick Knowles and the DIY team eet Sue, whose partner Barry died of a sudden heart attack in 2003, leaving her suffering from depression, dealing with two young children and living in a house that was falling apart. The team enlist the aid of their very own tartan army to tackle this build and try to help get this family back on track. The setting is perfect, the cottage could be lovely and the family need someone to come to their aid. Nick and the team have just nine days to help them.

• Secret Eaters

  Today, 20:00, Channel 4

  Anna Richardson continues to expose the nation's secret eating habits as she helps more people who are mystified by their weight gain.

  Anna travels to Welwyn Garden City, Hertfordshire, to meet the Castle family. The Castles are piling on the pounds at an alarming rate, but fail to understand why as they mostly eat mum Belinda's healthy, home-cooked food. They are given a chance to see where the weight gain is really coming from, using round-the-clock camera surveillance in their home and two private investigators to keep tabs on their eating habits.

• The Apprentice

  Today, 21:00, BBC1

  The candidates enter the world of online trading as they undertake the latest task in Lord Sugar's quest for a business partner.

  For one day only, the teams are to represent an online website that offers Londoners exclusive deals in hotel stays, beauty treatments, posh dinners and premium products. The teams' negotiation skills are tested to the full as they battle to strike the right deal, get a good discount and deliver their offers to the website. Nick and Karren watch on as the teams become increasingly desperate in their attempts to secure quality deals at the right price.

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  Beeny's Restoration Nightmare

  Today, 21:00, More4

  Sarah Beeny and her husband Graham Swift continue their tribulations with Rise Hall as they struggle to restore 97 rooms back to their former glory.

  Graham and Sarah take on the challenge of turning what they believe to be old servants' quarters at the back of Rise Hall into a pub-themed room. An expert conservationist reveals the extraordinary hidden history of the room's panelling. This turns out to be Jacobean, which means that it pre-dates Rise Hall by around 200 years, so how did it get there? Work on the pub-themed room is a welcome distraction from the stress of the couple's ongoing dispute with the local council.

• 24 Hours in A&E

  Today, 21:00, Channel 4

  Another fascinating look at the sharp end of medicine courtesy of King's College Hospital's A&E department, where this week we meet new recruit Matt.

  A 27-year-old emergency medicine trainee, Matt faces a challenging shift. The first trauma is horse-riding teenager Ellie, who has been airlifted to King's after being thrown from the saddle and crushed against a fence. She has no feeling down her left side and the team are worried that she may have serious spinal injuries. Pregnant Jill is in pain after a severe haemorrhage and fears that she may lose the baby, while four-year-old Destiny has a fishbone stuck in his tonsils.

• Peter Andre: My Life

  Today, 21:00, ITV2

  More from the reality series following Mysterious Girl singer and I'm a Celebrity... star Peter Andre

  His brother Andrew's battle with cancer has made Peter re-evaluate his life, and he decides to tackle his fears once and for all - with his fear of heights being first on the list. Then he goes to Paris, where his attempts at flirting in French leave a waitress cold. While in Paris, Peter receives the news that his coffee shop has been given only one star by hygiene inspectors. Back in the UK, Peter prepares for his first gig of the year.

• The Killing

  Today, 22:00, Channel 4 HD

  Finally back in touch with Holder, Sarah reviews the case with him, as the second series of the police drama continues.

  A question that is troubling them is why Rosie's backpack was dropped at the Larsen house two weeks after the murder. Was it dropped by the killer intending to torture the family, or a witness who felt remorse for not having come forward? And who is the person with the Ogi Jun tattoo who was caught on the security camera at the Beau Soleil fire? Sarah and Holder stake out Janek's place and realise that Stan has apparently renewed his connection with the Polish mob.

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  Greek Myths: Tales of Travelling Heroes

  Today, 22:00, BBC Four

  Eminent historian Robin Lane Fox goes in search of the origins of the classical Greek myths.

  Fox holds that the Greek myths lie at the root of western culture. But little is known about how these famous stories of gods and monsters came to be. After 35 years of travel, excavation and analysis, Fox has uncovered some surprising answers. From the ancient lost city of Hattusas in modern Turkey to the smouldering summit of the Sicilian volcano Mount Etna, this documentary takes the viewer on a voyage through the Mediterranean world of the 8th century BC.

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  The World's Largest Snake

  Today, 22:00, More4

  A fascinating - but spine-chilling! - documentary about the discovery of the biggest snake of all time, the Titanoboa.

  In 2009, a group of scientists stumbled upon the fossil of a creature deep in the Cerrejon coal mines in Colombia - a snake that would have spanned 48 feet and weighed over a tonne. A relative of modern boa constrictors, the Titanoboa lived in the rainforest of north-east Colombia 58 million years ago. Using CGI and scintillating cutting-edge science, the programme re-creates a time before dinosaurs, where giant reptiles such as the Titanoboa fought to become the planet's top predators.

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  Babies Behind Bars

  Today, 23:35, ITV1

  This two-part documentary follows the stories of a group of pregnant inmates at the Indiana Women's Prison in the USA.

  With a 400 per cent increase in the number of incarcerated women in the US in the last 30 years, prison births are becoming an increasingly regular occurrence. Many of the inmates are forced to give up their babies after just 24 hours, but the lucky ones get to keep their newborn children in a special prison nursery - Wee Ones, which was launched in 2007. The programme explores the personal stories of several prisoners, including Donna, who is serving a three-year sentence.

• Off by Heart: Shakespeare

  Today, 23:30, BBC HD

  Jeremy Paxman hosts the final of a nationwide competition designed to get school kids to put their computer games aside and study Shakespeare.

  Over the last year, thousands have taken part in a contest to learn some of the Bard's greatest speeches off by heart. The nine finalists, aged between 13 and 15 and from all over the UK, get the chance to visit Stratford-upon-Avon to take part in a series of workshops with the Royal Shakespeare Company. They then cast aside the slings and arrows of outrageous fortune before going once more unto the breach as they take part in a grand final to find the BBC Shakespeare Schools Champion.

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  My Phone Sex Secrets

  Today, 23:05, More4

  Insightful documentary following several women who work in the phone sex industry.

  New to the game is student Rosa. After weeks of job hunting without any luck, she believes her new role as a phone sex operator could just be the answer to her mounting debt. Meanwhile Jenny, a 10-year veteran of the industry, has become the master of dirty dialogue, and even talks to clients while friends are over. Lastly, dominatrix Marnie wonders if the handsome pay cheque is worth the effect her career has on some aspects of her life.

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  The Dales

  Today, 19:30, ITV1

  In this final episode of the series observing life in the Yorkshire Dales over the course of a summer, Adrian Edmondson returns to Ravenseat Farm.

  The Owen family are busy preparing for youngest son Miles's first day at school. Also on the horizon is a rare night away from the farm as the family attend a photography exhibition in Reeth, where they are the stars of the show. Meanwhile, estate agent Brian Carlisle takes on another role as he presides over the monthly family auction in Hawes village hall. Finally, as summer draws to an end, Dales vicar Anne Chapman holds a harvest festival for her parishioners.