This is gentle, absurdist, mini-sketch comedy, piloted in Radio 2 then given a series there back last autumn. These four new episodes come with a significant additional element, an animated trailer. To watch this go to bbc.co.uk/radio4. It's short, sweet and matches the humour of the show, the work of clever young artist Tom Rourke. But why is radio promoting itself visually? Because that's what reaches a generation who use smartphones to access everything, train times to pizza offers, with radio somewhere in the middle. The visualisation of radio is a growing field, increasingly used by commercial operators (to match advertisers to audience) as well as the BBC (always anxious to catch new listeners in any corner of their net). What matters still, however, is programme calibre. I think you'll find it here, in the company of Diane Morgan, Joe Wilkinson and David O'Doherty.