I'm Sorry, I'll Read That Again (often abbreviated as ISIRTA) is a BBC radio comedy programme that originated from the 1964 Cambridge University Footlights revue, Cambridge Circus. This is a scripted sketch show. It had a devoted youth following, with the live tapings enjoying very lively audiences, particularly when familiar themes and characters were repeated; a tradition that continued into the spinoff show I'm Sorry I Haven't a Clue.