A long-running ITV talent show hosted by Hughie Green, providing showcases for names such as Paul Daniels and Frank Carson. The series was revived on the BBC in the 1980s, hosted by Bob Monkhouse and former winner Les Dawson.
Who are the characters in Opportunity Knocks?
Dame Edna Everage, Bob Monkhouse, Charlie Chaplin, Cliff Richard, Humphrey Bogart, Inspector Cyril 'Blakey' Blake, Margaret Thatcher, and Paul Daniels