Stephen Fry masters the maths with Sandi Toksvig, Aisling Bea, Susan Calman and Alan Davies.Stephen Fry masters the maths with Sandi Toksvig, Aisling Bea, Susan Calman and Alan Davies.Stephen Fry masters the maths with Sandi Toksvig, Aisling Bea, Susan Calman and Alan Davies.