On the trail of the world's oldest joke - and it's so old even Des O'Connor 's forgotten it! Along the way, Dr Christopher Andrew and two schoolboy companions discover battlefield puns of a thousand years ago,
"nudge nudge, wink wink" gags from medieval monks, and the funny sides of the Bible, to the Romans and the ancient
Egyptians. In a Paleolithic cave they find a 15,000-year-old joke.... which would still raise a laugh in any playground.