Andrew Benfield has a thing about yetis - he believes they’re real. So he persuaded his friend, Richard Horsey, to join him on a four-year yeti search across the Himalayas.

The pair travelled to remote villages and mountain valleys and heard extraordinary stories about the mythical creature. They even received apparent bona fide evidence that the yeti exists. Is there any truth in these yeti stories?

Andrew and Richard look back over their long and driven quest and are surprised by what they find. You can listen to the whole series in full including the special bonus episode on BBC Sounds now.

A Loftus production for BBC Radio 4