"The Tsuranga Conundrum" by Chris Chibnallbloody hell another one? That's half the series now and he's bound to write the finale and New Year special as well. Even Rusty Davies had let a couple of other people have a go by this point, although admittedly he completely rewrote anything with anyone else's name on it anyway, but even so, all Chibbers has done so far is graciously allow Malorie Blackman to share a credit with him on one episode.
Directed by Jennifer Perrott. Spoilers after the cut.