Language is what defines humans from other species, and with our planet home to around 7,000 different languages, words have played a crucial role in our evolution. Renowned wordsmith Stephen Fry is the perfect guide for this fascinating exploration of language in all its forms: from cutting edge linguistic research to the glories of world literature. The five-part series travels the globe as Fry takes viewers on a journey through the thousands of years since man first mastered speech to the cyber world of today with its html, codes and texting. Revealing how language is used, abused and continues to evolve, Fry's Planet Word looks at whether we are any closer to understanding the most complex activity of the human brain. As seen on ABC.