It’s time for Thirteen to do what she does best—make speeches, improvise science, and thoroughly ruin someone’s evil plan.
Short Synopsis
The Thirteenth Doctor, Graham, Ryan, and Yaz land in Gaul during the height of the Roman Empire—just as the legions face off against a mysterious barbarian army wielding impossible, otherworldly powers. It’s not magic, of course. The Doctor doesn’t believe in that. But when alien witches called the Hynd show up turning soldiers into ash, disbelief starts looking increasingly optional.
Extended Storyline
As usual, the Doctor’s “quick trip to ancient Rome” turns into “accidental arrival at the bloodiest battle in European history.” The TARDIS materializes near a Roman encampment under siege, and before the Doctor can even say “Gaulish tourism,” Ryan and Yaz are being marched into custody as possible spies, while Graham tries—and fails—to talk his way out by claiming he’s a travelling toga salesman.
The Doctor, meanwhile, is having the time of her life. She loves the Romans. (“Such brilliant engineers! Terrible taste in politics. And sandals.”) But even she’s unsettled when she witnesses soldiers being vaporized by bolts of purple fire hurled by what appear to be sorcerers.
The enemy are known as the Hynd, a shadowy tribe from beyond the known lands—or at least, that’s what the Romans think. The Doctor quickly realizes they’re not humans at all, but alien warriors who’ve crashed on Earth and disguised themselves as barbarians. They wield something far worse than swords: technology so advanced it looks like magic. Their goal? To harvest the psychic energy of battle, fear, and death to fuel their broken starship. Essentially, they’re war junkies with a flair for pyrotechnics.
The Roman commander, General Agrippina, is tough, ruthless, and utterly baffled by the Doctor’s refusal to pick a side. (“You fight neither for Rome nor the enemy?” she demands. The Doctor smiles. “Oh, I never pick teams. I coachthem into doing better.”)
While the Doctor tries to reason with Agrippina, Yaz and Ryan find themselves behind enemy lines, where they learn the Hynd aren’t simply aliens—they’re refugees of a dying world, led by the merciless Magister Aulden, who believes pain and conquest are the only ways to survive. The Hynd consider humans primitive but useful batteries for their machines.
Graham, naturally, bonds with the Roman foot soldiers, becoming an unlikely morale booster. (“If we all make it through this,” he says, “first round’s on me. Assuming I figure out how to make Roman currency work in Sheffield.”)
When the Hynd unleash their ultimate weapon—a temporal rift that distorts reality around the battlefield—the Doctor realizes the Earth itself is at risk. The rift feeds on conflict, magnifying anger, suspicion, and despair. Entire legions turn against each other, and the TARDIS crew find themselves caught in a war that keeps rewriting itself every time someone dies.
The Doctor’s solution? Classic Thirteen logic: “If they’re feeding on war, then we starve them.” She persuades the Romans and the enemy soldiers to lay down their weapons, just long enough to deprive the Hynd of the psychic energy they need. When the aliens’ machines falter, she dives straight into their ship—sonic screwdriver in one hand, lecture on morality in the other—and rewires their system to reverse the rift.
The Hynd, exposed and defeated, are offered a chance to leave peacefully. Some accept. Aulden, of course, does not, and tries to destroy everyone rather than surrender. The Doctor faces him in the heart of the battlefield as reality cracks apart around them. Her calm, almost gentle defiance—“You’ve built your strength on fear. I build mine on hope.”—is enough to destabilize his control. The rift collapses, the Hynd vanish, and the Romans are left wondering what kind of god just saved them.
When Agrippina offers the Doctor command of an entire legion (“We could conquer the world together,” she says), Thirteen beams. “Oh, I’ve already done that once. Didn’t end well. Too many forms to fill out.”
The TARDIS dematerializes, leaving behind stunned Romans, bewildered barbarians, and one smoldering crater where alien tech used to be.
Back aboard the ship, Yaz muses, “So, alien witches?”
The Doctor shrugs. “Not witches. Just scientists with bad PR.”
Graham sighs. “Remind me again why we never end up somewhere with beaches?”
“Because,” the Doctor grins, “you always pack sunscreen, and that jinxes it.”