23:00Big Town All StarsSeries 1Episode 1: If You Scratch My BackBBC Radio 4 Extra Duration: 30 minutes Fri 29th Feb 2008, 23:00 on BBC Radio 7A teacher joins a struggling a cappella group to quit geography. Stars Stephen Tompkinson. From February 2000.GenresComedySitcomsBrandBig Town All StarsSeriesBig Town All Stars: Series 1 Source: BBC Online