The comedian and The Simpsons' voice artiste in the talk tag show, where the guest becomes the interviewer in the next show.

The UK's favourite sharp tongued American, Ruby Wax takes the microphone to interview voice of The Simpsons, face of Derek Smalls and political satirist Harry Shearer.

Ruby asks Harry to delve into some of his Simpsons characters, where he found the inspiration for Derek Smalls in Spinal Tap and who his favourite political target has been over the years.

Producer: Lianne Coop.

First broadcast on BBC Radio 4 in September 2010. Show less