From its origin on BBC Radio in 1949 the show provided a platform to fame for acts such as Spike Milligan and Frankie Vaughan.
Kiki Dee's hit single "Star" became the theme song for the revived BBC series.
[8] Unlike its rival New Faces, the winning acts on Opportunity Knocks were decided not by a panel of experts but by the viewing public.
The BBC revival was notable for being the first TV show to decide its winner using the now-standard method of a telephone vote.
[8] Entertainers who appeared included Freddie Starr and the Delmonts, Su Pollard, Paul Daniels, Darren Day, Pete the Plate Spinning Dog, Los Caracas (later to become Middle of the Road), Mary Hopkin, Bonnie Langford, Les Dawson, Maureen Myers, Barry Cummings, Royston Vasey (later to find fame as Roy Chubby Brown), Little and Large, Bobby Crush, Berni Flint, Tony Holland (The Muscle Man), Millican & Nesbitt, Neil Reid, Peters and Lee, Lena Zavaroni, Frank Carson, Max Boyce, Pam Ayres, Juniper Green, Gerry Monroe, Debra Stephenson, Tammy Jones, Paper Lace, Barry and Paul Elliott and Tony Monopoly.