Family time with Dr Who

We are on our summer break and the editorial office is closed until 18 January. In the meantime, please enjoy our Summer Hiatus series, in which our journalists curate an eclectic mix from our news and clinical archives throughout the year, The Conversation and other publications we share content with. Please note the comment function has been turned off while we are away. From Alan Perrott: Christmas always means Doctor Who, it's short, and I expect I'll have eaten way too much for anything important. Happy boxing day (is that a thing?).