In 1964, Mary Whitehouse launched a campaign to fight what she called the 'propaganda of disbelief, doubt and dirt' being poured into homes through the nation's radio and television sets. Whitehouse, senior mistress at a Shropshire secondary school, became the unlikely figurehead of a mass movement for censorship: the National Viewers' and Listeners' Association, now Mediawatch-uk. For almost forty years, she kept up the fight against the programme makers, politicians, pop stars and playwrights who she felt were dragging British culture into a sewer of blasphemy and obscenity. From Doctor Who ('Teatime brutality for tots') to Dennis Potter (whose mother sued her for libel and won) to the Beatles - whose Magical Mystery Tour escaped her intervention by the skin of its psychedelic teeth -.