I'm Sorry, I'll Read That Again was a long-running BBC radio comedy programme that originally grew out of the Cambridge University revue Cambridge Circus. It had something of a cult following and was broadcast initially on the BBC Home Service (renamed BBC Radio 4 in September 1967). It was first broadcast on April 4, 1964 and the eighth series was transmitted in November and December 1973. An hour-long 25th Anniversary show was broadcast in 1989. Humphrey Barclay was the producer until 1968 and from April that year the task was shared by David Hatch and Peter Titheradge.