The series starred Rob Brydon as Keith Barret, a naïve taxi driver going through a messy divorce from his wife, Marion, who has had a long-standing affair with her colleague, Geoff.
Each episode is presented as a monologue, filmed by a fixed camera in the confines of his car.
Keith's character is affectionately portrayed as a gentle dunce and draws a great deal of sympathy as the series progresses.
He is in denial about his divorce, and somehow always manages to look on the positive side of even the most awful situation.
Although he doesn't understand it, his life revolves around Marion and her new partner Geoff, and his love for his "little smashers" (his sons, Rhys and Alyn).