Sandi Toksvig considers Wales, whales, and wails with Elis James, Griff Rhys Jones, Kiri Pritchard-McLean and Alan Davies.

Sandi Toksvig takes a look at wings and wheels with Aisling Bea, Hank Green, Desiree Burch and Alan Davies.

Sandi and Alan take a look at some weaponry with Nish Kumar, Lou Sanders and Roisin Conaty.