Rhys James, Cally Beaton and Mark Billingham join Richard Osman to guess the ages of celebrities born between 21st - 27th October. This week, who did Mark go to university with? And did Rhys’ mum have an affair with them? But most importantly, have you done better than the players in the studio? For more information on this weeks' guests, they are on Twitter as: @rhysjamesy @callybeaton @billingham229b