The organic dairy industry is losing farmers - Anna Hill finds out why.
Wildlife sound recordist Chris Watson presents the yellow-browed warbler.
Monty Don explores the vulnerability of wildlife that need specialist conditions to live.
Globally cities continue to grow. Can wildlife and humans live together as cities spread?
2/4 Michael Blastland explores how our very human foibles can lead us into scandal. (R)
Wednesday 23 October 2013