A new stage version of Theodore Seuss Geisel's The Cat in The Hat, directed by Katie Mitchell for the Cottesloe Stage at the National Theatre in London, is aimed at three- to six-year-olds. Mark Ecclestone, armed with the opinions of several children, reviews. London's Wigmore Hall recently launched a series of concerts devoted to the countertenor voice, a register which has confused audiences over the years, and at times been accused of sounding unnatural. Three countertenors at different stages of their careers talk to Mark Lawson about perfecting the upper realms of the male voice. Rupert Everett, David Tennant, Sarah Harding and Celia Imrie star in St Trininan's 2: The Legend of Fritton's Gold, the follow-up to the 2007 film. Kate Saunders reviews. Front Row's selection of crime books for Christmas is made by critic Jeff Parks.