Chain Reaction - Series 6 - Ruby Wax interviews Harry Shearer

The new series of the tag team talk show continues as last week's guest, 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.