Spotting that there is no more solipsistic a profession than that of the standup comedian, Alan Yentob sets out to interview them, from Jimmy Carr to Jackie Mason, in this two-part Imagine. There are some interesting juxtapositions; a segment on Simon Amstell's deconstructionist comedy rubs up against Jim Davidson's limp attempts to legitimise a back catalogue of bigotry. Yet it's difficult to shake the suspicion that Yentob and co have overstretched themselves; the sheer number of comics gives the show a baggy, unfocused feel.