Neil (Frank Skinner) and Kim (Katherine Parkinson, The IT Crowd) are back and their verbal jousting is more combative than ever. This couple of bookworms have no children to interrupt their thought processes and so have plenty of time to flash their razor-sharp rapiers of verbal brilliance until there's only one man - or woman - left standing.

As ever, the trigger for a tiff can be as harmless as a nursery rhyme: who'd have thought that Jack Sprat's decision to eat no fat made his wife a repressed woman? The spat that starts with the Sprats ends on a bonding note, where both Neil and Kim agree that singing songs while strumming an acoustic guitar results in painful squirming among one's associates and should always be avoided. The intellectual face-offs might still be full-blown, but now there's an inkling of the love and mutual respect that holds this odd couple together.

The most loquacious comedy on the airwaves comes to a close this week as the verbose partners from hell fall out over celery, Androcles and the lion and the use of parentheses on notes stuck to the fridge door. Frank Skinner's writing has been a revelation.