1980s film that continues to 'haunt people's nightmares' free to watch on BBC iPlayer The film was written as a warning to highlight the dangers of nuclear war Threads will be broadcast on BBC Four tonight (Image: BBC ) A film that shocked a generation is available to watch on BBC iPlayer. Threads was first aired on BBC2 in 1984 and again in 1985 on BBC1, before disappearing off television screens for years. Set in Sheffield, the film focuses on the city after it has been hit by a nuclear bomb. It delves into the impact of a nuclear holocaust...