Delving into the dark side - to explore the unexplainable.
More quick-fire sketches, terrible puns, humorous songs and parodies.
Stars Tim Brooke-Taylor, John Cleese, Graeme Garden, David Hatch, Jo Kendall and Bill Oddie.
Written by John Esmonde & Bob Larbey, Peter Vincent & David McKellar, David Hatch, Eric Idle and Bill Oddie.
Originating from the Cambridge University Footlights revue 'Cambridge Circus', ISIRTA ran for 8 years on BBC Radio and quickly developed a cult following.
Music and songs by Dave Lee, Bill Oddie and Leon Cohen.
Producer: Humphrey Barclay
First broadcast on the BBC Home Service in May 1966.