It’s only the second most famous stare in Britain – Paddington is top, of course – but Louis Theroux’s “looks” have still frowned him through one of the more successful 21st-century careers in serious TV. Whereas the bear goes in for pure, chastening intensity, Theroux comes with a facial array of tics and gurns, the better to convey criticism and judgement: one-eye blinks, lib-nibbles, eyebrow-raises and side-eyes. As intrepid and socially conscious he may be, it’s this rictus that has made Theroux a star, the concerned Everyman, greeting and gauging the weirdness of our time. My problem with Louis’s looks...