Mike Yarwood

This sparklingly funny documentary, part of a series on different aspects of British light entertainment which originally went out in 2006, explores the role that impressionists have played in British entertainment over the last 50 years. Its subjects range from Mike Yarwood's pitch-perfect lambasting of Harold Wilson in the Sixties up to the present-day work of Ronni Ancona and Alistair McGowan.

In the 70s, audiences laughed in appreciative recognition as Mike Yarwood impersonated a range of public characters, even including trade union leaders. With latterday cultural fragmentation and the thin spread of increasingly nondescript "celebrities", the job of an impressions show such as this, starring Morgana Robinson and Terry Mynott, becomes all the harder. It is telling that they often have to announce who it is they're doing. Still, this is as capable as could be expected; in the first episode, Bear Grylls tries out his survival skills in the suburbs, while David Attenborough studies at close hand the remarkable animal that is Frankie Boyle.

No hiding behind fourth wall-busting quiz-coms this time round. To paraphrase Mike Yarwood, this is him - or at least the mildly neurotic, passive-aggressive persona Brydon often adopts, before an audience probably more familiar with him via Gavin & Stacey than, say, A Cock And Bull Story. But can he carry off an entire chatshow on his own? Hard to say: as guest "Dame David Walliams" silkily bitches at one point, "Is it meant to be a comedy show?" "In an ideal world," comes the half-joking retort. But this may yet find its legs.