 The show ran for nine series and was first broadcast on 3 April 1964, the pilot programme having been broadcast on 30 December 1963 under the title "Cambridge Circus", on the then BBC Home Service (relaunched as BBC Radio 4 in September 1967).Series 1 comprised three episodes.Subsequent series were broadcast on the BBC Light Programme (relaunched as BBC Radio 2 in September 1967).