First transmitted in 1999, a self-made multi-millionaire, a would-be rock star and a veteran fish trader are among the many dedicated traders wheeling and dealing at Billingsgate, the early morning seafood bazaar which is Britain's largest inland fish market.

The documentary series continues with this film about Corinne Landriscina and Mark Stebbings, who live together and also work together as bailiffs recovering unpaid council tax in Leeds.

On 7 December three members of the Essex drugs underworld were found executed in a Range Rover. Their killers were convicted solely on the basis of testimony by supergrass Darren Nicholls, who is interviewed in this film exposing the myths and realities of life as a supergrass.

The documentary series takes a revealing look at modern relationships through the eyes of various couples in emotional turmoil.

The documentary series concludes with an examination of how gun ownership in America has affected young people. In Texas, the film looks at Houston's most violent areas and meets children who have suffered the trauma of being shot.

Tonight's programme explores the world of heart transplantation at Papworth hospital. It is 20 years since the first successful heart transplants were carried out in the UK at Papworth and the demand for transplantation now far outstrips the supply of organs. Doctors are faced with tough decisions as they decide who will live and who will die.

Tonight's film tells the story of a "supergrass" whose information led to two men being jailed for life for murder. After three members of the Essex drugs underworld were killed in 1995, the police had no leads - until getaway driver Darren Nicholls turned informer. But the family of one of the convicted men are fighting to prove his innocence. Actors speak the words of Nicholls and his wife.

Tonight's film travels to Rostov in Russia, a city that has earned the reputation of serial-killer capital of the world. Inside Story meets top psychiatrist Dr Alexander Bukhanovsky and investigates his continuing efforts to unlock the inner mind of the serial killer.

Despite contravening the law and being banned by the Mormon church, polygamy is still thriving in Utah. Tonight's film presents an insight into the secretive and often bizarre world that polygamists enter into. They believe that the arrangement is a step forward they must take on the road to heaven.

On Boxing Day 1994, young doctor Joan Francisco was found strangled at her London flat. The victim's family were convinced they knew the killer, an obsessed ex-boyfriend, but police claimed there was insufficient evidence to arrest him. This Inside Story special chronicles the family's five-year quest for justice.

Author Binjamin Wilkomirski's book Fragments, an account of his childhood in the Nazi concentration camps at Auschwitz and Majdanek, was acclaimed as a classic of Holocaust literature. However last year a newspaper declared Wilkomirski a fraud. This Inside Story special examines the historical evidence to establish who is telling the truth.