One-year-old Tango became the star of the discussion programme after finding his way into the school hall where it was being recorded.
He ducked under a desk and headed towards the panel. At first, Dimbleby and guests including employment minister Jim Knight and Tory security spokesman Dame Pauline Neville-Jones were oblivious to his presence.
But as he pawed under the table he caught the eye of LibDem MP Julia Goldsworthy, who in astonishment mouthed the word 'cat' at the production team.
Meanwhile, Jackie Ellery of Newquay, England hadn't seen her cat Tango in hours. As she wondered about his whereabouts, she sat down to watch TV.
She said: 'My friend phoned me to say, "Have you seen your cat on the telly?" And there he was.
'It's lovely - he's a mischievous cat anyway and because we live so close to the school he's often in the school grounds.'
Tango, who returned to his owner that night, has since become something of a celebrity. Mrs Ellery said: 'I've even been asked for his paw-tograph.'
Link - via Arbroath