A particularly fine episode of a comedy-drama that has 5 million discerning fans. Yes, it's quaint and tells the same tale every time, but the array of reliably funny minor characters gives it more laugh-out-loud moments every week than most sitcoms. At its centre tonight is Caroline Quentin as the rogue veterinarian Angela, whose blase approach to both the disruptive behaviour and scarlet fever of her nephew Toby (Rocco Peacock) results in a classic DM clifftop caper.