Complex sentence: It was first broadcast on 3 April 1964--the pilot programme having been broadcast on 30 December 1963 under the title "Cambridge Circus"--and the ninth series was transmitted in November and December 1973.
Split into simpler sentences: It was first broadcast on 3 April 1964, the pilot programme having been broadcast on 30 December 1963 under the title "Cambridge Circus". The ninth series was transmitted in November and December 1973.