Here is a thing Doctor Who does not usually do: build an army. The show’s whole disposition is one clever man with a screwdriver talking his way out of a room, and it has spent decades being faintly appalled by force. So an episode that opens with the Doctor calling in debts across the universe to assemble a war party is a statement of intent, and the sharpest thing about “A Good Man Goes to War” is that it turns out to be an argument against the thing it appears to be celebrating. It’s also the episode where a question the show has been dangling for three years finally gets answered, and the answer is very good.
We open on Rory Williams, in full Roman centurion dress, standing on the bridge of a Cyberman fleet asking politely where his wife is. It’s a magnificent piece of showmanship. He asks twice. He is told, condescendingly, that the Cyber-legion doesn’t negotiate, and behind him, through the window, the entire fleet detonates. He doesn’t turn round to look at it. He asks his question a third time. Arthur Darvill has quietly become the best-served character on this programme: the joke of Rory used to be that he was the one who got left behind, and two seasons on he is the man who waited two thousand years, and the show has stopped treating that as a punchline. This is his introduction as something genuinely frightening, and it earns every second of it.

It’s set up by a small piece of misdirection that’s worth admiring. The episode opens on Amy, holding her newborn in a cell, telling the child about a man who is coming for them, the last of his kind, brave, unstoppable, the best man she knows. Every beat is written so you assume she’s describing the Doctor. She isn’t. She’s describing her husband, and the switch that lands on Rory in Roman armour rather than a bow tie is the episode announcing, in its first ninety seconds, whose story this actually is.
Calling in favours
Amy has given birth on Demons Run, an asteroid fortress crewed by the Church, Colonel Manton’s clerics, and the Headless Monks, an order who have taken their vows rather literally and carry their heads under their arms. Against them the Doctor brings a collection of debts. Madame Vastra, a Silurian living in Victorian London and eating Jack the Ripper. Jenny Flint, her wife, who is handy with a sword and handier with a straight line. Commander Strax, a Sontaran clone-warrior serving out a penance as a nurse, which is exactly the sort of joke that shouldn’t work and completely does. Dorium Maldovar, blue and venal and reluctant. And, arriving by pirate ship, Captain Henry Avery and his son Toby, still crewing the alien vessel they inherited in The Curse of the Black Spot, which is a payoff for an episode I’d written off entirely and a reminder that this season’s plotting is playing a longer game than any given week suggests.
The assault itself is over almost before it starts, and deliberately so. The Doctor takes an armed fortress without a shot fired, by making a speech, and then makes Manton order his own troops to run, repeating the phrase until it sticks, so that the man will be known for the rest of his life as Colonel Runaway. It is a brilliant, ugly, deeply unpleasant piece of business, and the episode knows it. That’s the thesis, in fact. Vastra puts it plainly and River puts it harder: the word “Doctor” means healer on most worlds, and on a great many others it has now come to mean something else entirely. Warrior. The reason there is a fortress full of soldiers here at all, terrified, armed to the teeth, defending a baby against him, is him. His reputation built this. The monsters have started planning for him specifically, and one of them has worked out that the most efficient weapon to use against the Doctor is a person he loves.
Lorna Bucket carries the same point in miniature. She’s a girl from the Gamma Forests who met the Doctor once as a child, joined the Church specifically to see him again, and dies on the floor of Demons Run having never really been noticed by him. He doesn’t know who she is. He pretends he does, because she’s dying and it’s kind. It’s a small, mean, honest scene about what it costs other people to have been briefly interesting to this man, and the episode drops it in without underlining it once.
Melody
And then the trap closes, and the trap is that there was never anything to win. The baby in the cot has been Flesh since before the Doctor arrived, the same programmable matter that took Amy’s place in The Almost People, and Kovarian has been gone with the real Melody for some time. It dissolves in Amy’s arms while she’s holding it. Karen Gillan plays that beat without a shred of vanity and it is genuinely hard to watch. The army was a distraction. The Doctor did exactly what his enemies needed him to do, at exactly the speed they needed him to do it, because they knew he would come.
Then River Song arrives, having refused to come any earlier, and delivers the answer. Melody Pond. In the language of the Gamma Forests there is no word for “pond”, because the only water in the forest is the river. It’s the line Idris handed to Rory in The Doctor’s Wife as something he’d need one day, and here is the day. River Song is Melody Pond, Amy and Rory’s daughter, conceived aboard the TARDIS in the vortex on their wedding night, which is where the Time Lord DNA came from, which is why Kovarian wanted her. It’s a proper answer, one that reaches backwards and improves things rather than replacing them. Every scene River has played opposite these people acquires a second meaning, her flirtation with the Doctor, which has always run slightly hot, is suddenly a much stranger and sadder shape, and her death in a library in Forest of the Dead, still from his side a thing that has already happened, is now the death of Amy Pond’s baby in his arms years ago. The Doctor’s reaction is to laugh, grab his hat and leave immediately, which is either delight or panic and is very obviously both.
Lorna Bucket is the detail that stays with me longest: a woman who crossed a galaxy just to see him again, and who has to explain her own name to him as she’s dying. Demons Run exists for no reason except that he does, and nobody around him seems to be frightened of a man with a screwdriver anymore.
Rating: 4.5/5. Enormous, confident and cleverly built, an episode that spends its whole runtime assembling a triumph so it can demonstrate that the triumph was the trap. It drops half a mark because the army it builds is more fun as a promise than as a fight, since Vastra, Jenny and Strax are so good you resent how little they get, and the Headless Monks are a superb design given almost nothing to do. A centurion, a Silurian, a Sontaran nurse and a pirate walk into an asteroid. They win it in an afternoon, and it costs a baby. Somewhere out there a woman he has already buried is his best friends’ daughter.









