Professor Challenger sets out to find a lost race of creatures in the heart of the Amazon. Stars David Robb and Jamie Glover.

1/2 A Bridge to the Unknown

By Arthur Conan Doyle, dramatised by Chris Harrald. The hot-headed Professor Challenger claims that extinct species of animals are still to be found living on an isolated Amazonian plateau. Dr Summerlee, Lord John Roxton and the intrepid reporter, Edward Malone, find themselves committed to a journey of a lifetime.

Professor Challenger...David Robb

Dr Diana Summerlee...Jasmine Hyde

Lord John Roxton...Jamie Glover

Edward Malone...Jonathan Forbes

Gomez...Milton Lopes

Beaumont...Sam Dale

Meldrum...Sean Baker

Maple White...Nyasha Hatendi

Tarp Henry...Brian Bowles

Edith Challenger...Jane Whittenshaw

Indian tribesman...Vinicius Salles

Directed by Marilyn Imrie

Dramatist Chris Harrald is a writer for radio film and television. He won the 2009 Sony Gold award for radio drama for his play 'Mr Larkin's Awkward Day'.