Three documentaries looking at a host of infamous murderers. In 'Terrorising the Cities' the Boston Strangler created a climate of fear for every woman during the early 1960s. Albert De Salvo was a known sexual predator but was he the Boston Strangler? Richard Ramirez was named the 'Night Stalker' due to entering people's houses at night and randomly killing any man, woman or child that stood in his way. The 'Trash Bag Killer' left the dismembered remains of his victims neatly tied up along the edge of the Californian freeway. Patrick Kearney eventually confessed to 32 murders. In 'Streets of Fear' the manhunt for the Yorkshire Ripper was the largest ever mounted in British police history. Peter Sutcliffe murdered 13 women over six years before finally being arrested in 1981. Arthur Shawcross killed eleven women in his reign as the 'Genesse River' serial killer. But why was he released after the murder of two small children to kill again? Joel Rifkin was New York's most prolific serial killer who murdered women and dismembered them in the house he shared with his old mother. In 'Spree Killings' Bonnie and Clyde were murderous gangsters who would kill anybody that crossed them. They would eventually pay for their crimes in a hail of bullets. Charles Starkweather and Caril Fugate were the inspiration for the film 'Natural Born Killers' after their killing spree left ten people dead in one week. Paul Knowles was dubbed the 'Casanova Killer' as he murdered at least 18 people before being shot as he tried to escape.