1/2. Mark Radcliffe explores the chequered history of talent shows. Hughie Green 's Opportunity Knocks was the granddaddy of all talent contests. Radcliffe relates its early history. Producer Libby Cross
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1/2. Mark Radcliffe explores the chequered history of talent shows. Hughie Green 's Opportunity Knocks was the granddaddy of all talent contests. Radcliffe relates its early history. Producer Libby Cross