Simon Reeve continues his epic journey around the Tropic of Cancer, the northern border of the tropics region (BBC 2, Sunday).

What's on the box this week?

'Girls On The Frontline' (BBC 3, Thursday, 9pm) - A documentary that brings unique access to young women in the British Army at the frontline of the conflict in Afghanistan, as it follows them and their families back home, throughout the most challenging time of their lives on a tour of duty that none of them will forget. The documentary explores how these young women, all in their 20s, face the challenges of some of the most violent months so far in Afghanistan for British Forces. The four of them have to live side-by-side with around 170 men on a tiny base. They sleep in cots close to the men and share the same facilities. They also have to give orders and demand respect in a very male-orientated environment. The documentary also examines how their relationships with those back home have changed. 'Over The Rainbow' (BBC 1, Saturday, 9pm) - Andrew Lloyd Webber and host Graham Norton are reunited for 'Over The Rainbow', a new series of the national talent search to discover a West End star. A new panel of experts, featuring Charlotte Church, Sheila Hancock and John Partridge, is on hand to champion their favourite, as the nationwide search for a Dorothy - and Toto - to fill the ruby red slippers begins. For the first time, the audition process is opened up to viewers, allowing them to choose an 11th wildcard Dorothy to complete next week's first live show line-up. 'The Big Bazaar' (RTE 2, Saturday, 10.30am) - A new 10-part series which challenges teams of nine to 12 year-olds to raise money for local causes by organising a massive bazaar. Each week, two teams go head-to-head to see who can make the most amount of money for their cause. To organise the bazaar, they must gather stuff to sell, come up with novel games, select things to auction, publicise it and get the public to turn up with money in their pockets! The teams are given two days to raid their attics for jumble, make buns, coax their families, friends and neighbours to part with toys, antiques, books, cakes and whatever else might sell. They also need to come up with money-making schemes to encourage the public to part with their cash - from face-painting to paper airplane races to penalty shoot-outs. Anything goes. With two hours of frenzied selling, each bazaar climaxes with an auction where each team has an opportunity to sell their three top items. In each programme, antiques expert Roxane Moorhead is on hand with valuations and selling tips for the children. 'The South Bank Show' (ITV, Sunday, 10.15pm) - Melvyn Bragg's first programme in the series is with Andrew Lloyd Webber as he prepares for the opening of 'Love Never Dies' at the Adelphi Theatre. The show continues the story of 'The Phantom', who has moved from his lair in the Paris Opera House to haunt the fairgrounds of Coney Island. Over the years 'The South Bank Show' has interviewed Andrew Lloyd Webber four times. Meeting at The Adelphi Theatre, this film uses archive from the original 'South Bank Shows' and Bragg and Lloyd Webber bring the world of his musicals up to date - and discuss his recent and highly successful foray into television talent shows. Other new shows with new interviews in the series include David Hockney, Billy Connolly, Ian McEwan, Ian McKellen, Stephen Sondheim, Judi Dench and Kiri Te Kanawa. 'Tropic Of Cancer' (BBC 2, Sunday, 9pm) - Author and broadcaster Simon Reeve embarks on his most ambitious journey yet, circling the world following the line that marks the northern border of the Earth's tropical region. The third leg of Reeve's journey around the Tropic of Cancer takes him from the waters of the River Nile to the edge of the Indian Ocean in Oman. At the spectacular ancient ruins of Abu Simbel, he meets Nubians struggling to maintain their culture following their displacement by the damning of the Nile and the formation of the vast Lake Nasser in the 1960s. On the edge of the desert, he meets a Bedouin leader called Ali the Lion, who explains how his people are being forced from their traditional nomadic lifestyle by a seven-year drought that scientists believe is caused by global climate change, one of the greatest challenges facing the tropics. 'The Delicious Miss Dahl' (BBC 2, Tuesday 8.30pm) - In a loving mood and inspired by the romance of book shops and 'Brief Encounter' moments at train stations, Sophie Dahl works through some perfect dishes for the three stages of romance, as her cookery series continues. Her perfect dish for the early stages of courtship, making dinner for a special someone for the first time, is scallops roasted in their shells on a barbeque, with garlic and chilli marinade, accompanied by minty peas. She follows this with a glorious mountain of rhubarb and rosewater Eton mess, sprinkled with crystallised rose petals. As romance develops, the honeymoon phase is all about serving long, lazy breakfasts and brunches. Dahl's dish of choice is cheese soufflé blinis with scrambled eggs and smoked salmon. Movie Of The Week: 'Godsend' (BBC 1, Friday 11.50pm) - Drama about a couple who make the decision to have their eight-year-old son cloned following his death in a tragic accident. Under the supervision of a stem cell research expert, the couple's son is illegally cloned in what appears to be a successful procedure. Their lives are turned upside down, however, when the boy reaches his eighth birthday and his frightening dreams start to endanger his family. Greg Kinnear and Robert De Niro star.