3/3 The animals that have pushed their sense of smell far beyond human abilities.
3/3 Pedalling through the heat and rain, John takes on a gruelling military fitness test.
6/8 A gallop across the Steppe with extraordinary 'born in the saddle' Mongolian horsemen.
High definition Audio described
8/10 Charlie treats a flat-coated retriever involved in a serious road accident.
2/2 Chris Packham examines the otherworldly phenomenon known as milky seas.
4/31 Neil Oliver performs on the stage of a remarkable coastal amphitheatre near Land's End.
Looking at how asteroids are responsible for both life and death on our planet.
1/2 Chris Packham examines a baffling case of exploding toads in Germany.
John Craven and Anita Rani are in Herefordshire exploring the county's foodie culture.
Jules Hudson and Ellie Harrison are in Staffordshire exploring its wide open moorlands.