In some versions (eg the one on Amazon video) but not in the original ITV broadcast in the UK, Alan Cumming introduces the episode.
Chief Superintendent Jean Innocent:
God only knows what possessed you to enter into some misbegotten pissing match with men of that standing!
DI Robert Lewis: What's so special about Oxford?
Chief Superintendent Jean Innocent: What?
DI Robert Lewis: The chippy copper antics. Why is it so much more inappropriate in this city than anywhere else?
End-credits statement: "The verified carbon footprint of Lewis is 830 tonnes"
If you're in the mood to rock out and laugh, here are five fan favorites.