Stephen Fry talks to presenter Michael Rosen about their mutual obsession with language: the particular joys they both find in speech and in writing and how language is developing. Starting at the very beginning with Stephen's theory about where a facility with words may come from, then dashing through the joy of finding connections between words in different languages, of listening to the rhythms of music-hall patter, in telephone voicemail messages and in rap, to sketch-writing with Hugh Laurie, presenting QI, the essential seriousness of comedy, the virtues of email and text as opposed to the sheer horror of having to talk on the telephone, and one time when Stephen's famous fluency broke down..