There will be bashful murmurs of agreement when Marcus Brigstocke admits he's no longer able to help his nine-year-old son with his maths. Luckily for him and fellow comic Josh Widdicombe, maths professor Marcus du Sautoy is on hand to guide them through some tricky teasers, as they test their amateur problem-solving against finely tuned maths bod Dara O'Briain.

The challenges are surprisingly difficult, but there is a relatively comprehensible explanation of the most efficient way to wrap a present. Here's a clue: the key is in the width of the strips, and not, as Marcus quips, to take it to the fifth floor of John Lewis.

Prom 20: Horrible Histories - review

Pitched somewhere between a pantomime, a Footlights revue and an old-school variety show, this year's free Family Prom barely qualified for its Prom status, save for 10 judiciously chosen classical excerpts that were crowbarred in between the skits. Not that it mattered: the queue for returns snaked several hundred yards out of the Albert Hall, suggesting that this show could probably have filled Wembley Stadium.

Meera Syal's funny Valentine

The Asian comedian and writer is taking on the title role in Willy Russell's Shirley Valentine, and doing it in Scouse.

Justin Lee Collins: Mr Bouncy's castle

Good Times, the presenter's new chat show on Five, has as much fun with the audience as with the celebrity guests.