TV highlights 02/08/2012

Amish: A Secret Life 9pm, BBC2 A quarter of a million Amish people live in America, most of whom believe so strongly in holding on to the old ways of simplicity and plain living that photography is banned. So it is surprising that one family agrees to be filmed for this one-off documentary. They prayed for two weeks before deciding that providing an illuminating insight into the Amish lifestyle was worth the risk of excommunication from their community. The result is fascinating. Julia Raeside The Briefs 9pm, ITV1 First of a two-part series examining the everyday reality of British criminal law, seen from the frontline perspective of Manchester-based firm Tuckers. Like the excellent 24 Hours in A&E this is a drama that writes itself almost by definition: everybody who comes through the doors is undergoing an experience they will never forget. The cases that feature tonight will probably stick in the memories of the lawyers as well – a 63-year-old woman accused of drug dealing, and a man on trial for blackmailing Coleen Rooney. Andrew Mueller Undercover at the News of the World 11.05pm, Channel 4 For a man who is seldom photographed, journalist Mazher Mahmood has a very high profile. As the head of the News of the World's special investigations unit and inventor of the "Fake Sheikh sting", he brought the now-deceased Sunday tabloid some big scoops, and enjoyed a swashbuckling notoriety. This documentary looks back at a period where the NOTW routinely outdid its competitors in the headline stakes, and speaks to those left exposed as a result of Mahmood's underhand efforts. John Robinson BBC Proms 2012 8pm, BBC4 Completed in 1749, just a year before his death, Johann Sebastian Bach's Mass in B Minor was intended to act as a glorious summation of his sacred music. As things turned out, the piece languished in obscurity until it was rediscovered in the 19th century, and has since come to be regarded as a key work of the late baroque era. This prom from the Royal Albert Hall features the English Concert and Choir of the English Concert conducted by Harry Bicket. Charles Hazlewood presents the coverage. Jonathan Wright Screenwriters – The Bafta and BFI Lectures 8pm, Sky Arts 1 The first of seven talks from outstanding screenwriters sees the Oscar-nominated William Nicholson discuss a career that includes co-writing credits on Gladiator , Elizabeth: The Golden Age and Shadowlands . He discusses how the job of screenwriter – arguably the most important on any film set – came to be regarded as the bottom of the food chain. He even dubs the much more lauded directors "minor functionaries". Someone had to say it. Other talks in this new series include those from Frank Cottrell Boyce and Charlie Kaufman . Nice work, Sky Arts. Julia Raeside Lemon La Vida Loca 10pm, ITV2 Reality TV reaches new levels of invasiveness as irrepressible comic character Keith Lemon grants exclusive access to his world . As you'd expect from someone with so much cash, charisma and chest hair, he has a pretty action-packed personal life. This opening episode sees his girlfriend Rosie moving from Leeds to join him in London, where he sets out to buy a £6m house. But will a certain Fearne Cotton spoil their domestic bliss? Leigh Francis's alter ego also gives fans a glimpse of the man behind the 'tache on set as he films Celebrity Juice, Lemonaid and his movie debut. Hannah Verdier