The Secret Millionaire

Tony Banks, 47, made his fortune running care homes for the elderly. Tony leaves behind his millions to adopt a secret identity in Anfield, Liverpool, where he looks for and is introduced to people who may need his help. Tony struggles to live on the breadline and the realities of life on some of Liverpool's toughest streets begin to hit home. As his mission nears an end, Tony faces a personal battle.

Multi-millionaire Paul Ragan heads to Derby. From the age of five, Paul had to deal with his mother's schizophrenia. Now he wants to help people who devote their lives to caring for others.

Gadget-mad entrepreneur Chris Brown accepts that some people might consider him a geek. Chris's love of technology has made him a fortune. Five years ago, he set up a travel website in his bedroom. Today, his travel business has a £35million turnover. Chris heads to an area in north Manchester blighted by high levels of crime and anti-social behaviour, posing as a photographer and determined to find people to help.

Karate expert and father of four Richard North is in the business of fun. His multi-million-pound company invents gifts and toys that sell all around the world, to some of the biggest toy retailers. For eight days Richard goes undercover in Cardiff. He tells people he meets that he's a full time karate instructor, a sport he's been involved with for the last 20 years.

For eight days, Marcelle Speller leaves behind her art collection and her London apartment to go undercover in Plymouth. The city was once the greatest naval port in the world, with a thriving Royal Navy dockyard at its heart, but the docks have cut their workforce by 75 percent and now a quarter of the population live in deprivation. During her stay, Marcelle lives in the city centre, next door to a pub.

Self-made multi-millionaire Mark Pearson's internet-based business has boomed over the last three years, earning him a fortune of over £60 million. Mark and his boyfriend Aaron are quite at home hosting dinner parties at their Surrey mansion, which is a far cry from his start in life. Mark steps out of his comfort zone to move into a rented house in Nottingham in search of people he can help.