Five programmes on the impact of white ' civilisation ' on native cultures. 1: The Heart of Darkness Written by DONALD THOMAS Narrated by Richard Bebb with the voices of: PETER LEABOURNE , HAYDN JONES , NIGEL GRAHAM , CLIF-FORD NORGATE, WILFRID CARTER , ALAN BARRY , TOMMY EYTLE and EDDIE MATTHEWS Producer MAURICE LEITCH (First broadcast in 1975)