Edge of Darkness policy debate about energy and environmental issues. Advice on the policing aspects of the serial was provided by the West Yorkshire Police and former Scotland Yard detective Jack Slipper, famous for his pursuit of the train robber Ronnie Biggs. The musical score was provided by Eric Clapton and Michael Kamen. Clapton was approached to provide the score by producer Michael Wearing. Shortly afterwards, when Michael Kamen brought Clapton to a screening of "Brazil" (1985), which he, Kamen, had scored, Eric suggested a collaboration between the two on "Edge of Darkness". Kamen became one of Hollywood's most successful film composers, writing
Ronnie Biggs the Barbados coastguard and towed into port in Barbados. The kidnappers hoped to collect a reward from the British police; however, like Brazil, Barbados was found to have had no valid extradition treaty with the United Kingdom (a fact which chess player David Levy claimed to have paid lawyers to unearth) and Biggs was sent back to Brazil. Biggs's son by de Castro, Michael Biggs, eventually became a member of the successful children's programme and music band Turma do Balão Mágico, bringing a new source of income to his father. In a short time, however, the band faded into obscurity