Part 2 of this terrific show features the spectacular vocal skills of Alistair McGowan and Kate O'Sullivan. We discuss the difficulties involved in maintaining an impression, Alistair amply demonstrating his mastery of the art in a longish sketch as Chris Packham. Kate excels as Nigella and a host of other characters, while I mostly sit back and leave them to it. Loads of great voices, fascinating chat about how and why we do impressions, plus amazing insights and anecdotes. Enjoy.