What's So Funny?Series 3Episode 1BBC Radio 4 Extra Duration: 30 minutesFirst broadcast: Fri 31st Aug 2012, 07:30 on BBC Radio 4 ExtraLatest broadcast: Sun 2nd Sep 2012, 05:30 on BBC Radio 4 ExtraEd Byrne returns. Alan Davies, Craig Campbell and Jo Caulfield discuss the Edinburgh Festival's impact on their national tours.GenresComedyBrandWhat's So Funny?SeriesWhat's So Funny?: Series 3 Source: BBC Online