A look at television's changing relationship, and recent obsession, with the countryside.
Bill Oddie explores 100 years of wildlife filming.
Rob Brydon hosts an episode of unseen material from the panel show.
Frank Skinner, Bill Oddie, Jon Richardson and Sarah Millican join the regulars.
Can a team of natural history presenters triumph over the general knowledge Goliaths?
How birds like the skylark and the nightingale have defined the nature of the countryside.
How the destruction of wetlands meant the possible extinction of Britain's waterbirds.