“I’m the Doctor, and I’m the man who defeats the monsters.” What an amazing moment. It feels as though the Doctor arrives on the scene with a renewed sense of purpose. He’s been kept away from the action for much of the story, but here he makes up for lost time, with a clarity about who he is that has sometimes been missing from this series. While the moment is slightly undermined by the continuation of the “Am I a good man?” theme, which feels a little overused at this point - that’s a minor issue in an episode brimming with charm, fun, and energy.

The TARDIS changing size, the Doctor advising only through his voice, and using Clara as his eyes and even physically moving the mini TARDIS with his hand - these moments are absolutely hilarious and heart warming. The villains, the graffiti-monsters or “Boneless”, are a fascinating concept, adding a distinct and creative menace to the story.

What stands out most is Clara. She absolutely shines in this episode, stepping into the Doctor’s shoes and taking the lead. It’s a fantastic opportunity for her character, and she makes the most of it, proving just how capable and compelling she is. Few companions get an episode like this, and at no point does it feel like the Doctor’s absence diminishes the energy of the story.

This is a truly compelling episode, filled with originality and character. Jamie Mathieson has delivered something special two weeks in a row, raising the standard of the series and creating a story that stands out as particularly memorable.