Of all the recent TV documentaries, few have been as entertaining as When Louis Met…, the series in which the eponymous Louis Theroux interviewed a galaxy of world-famous weirdos, such as Sir Jimmy Saville, Max Clifford and Neil and Christine Hamilton. Now Louis has turned his attention to the law. Under the guise of Allen & Overy associate Graham Knight, Theroux is witnessing first-hand the inner workings of one of the world’s leading law firms. As the man himself puts it, he’s “setting out to discover the genuinely odd in the most ordinary setting”. He’s unlikely to be short of material.