Character mistake: Both Jeremy Clarkson and his guest Sir Michael Parkinson identify "The Four Yorkshiremen" sketch - about four Yorkshiremen trying to outdo each other with their complaints about life - as a Monty Python sketch. It isn't. It is from "At Last The 1948 Show", presented by David Frost, and was first performed by Tim Brooke-Taylor, John Cleese, Graham Chapman and Marty Feldman, although Monty Python have often performed it.