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Man at the Top was a theatrical-film spin-off of a popular British TV series, inspired by the earlier movies Room at the Top and Life at the Top. Kenneth Haigh starred in the series as Joe Lampton, the successful but emotionally empty business executive portrayed in the earlier films by Laurence Harvey. In Man at the Top, Lampton (Haigh again) endures a crisis of conscience. He knows that his pharmaceutical firm is about to market an untested and possibly dangerous drug. He is also bound by ties of familial loyalty: His boss (Harry Andrews) happens to be his father-in-law. Nanette Newman, a busy doe-eyed ingenue of the 1960s, is quietly effective as the middle-aged Mrs. Lampton.