More of the same. It’s like returning to the same villa year after year. ... Above all, like the Acropolis towering over Athens, here’s Louisa, the most magnificent Durrell (scrap that, person) on (and off) Corfu, and the reason that this show has stayed delightful and not descended into silliness. Keeley Hawes’s Mrs Durrell is up there with the great small-screen mothers.