Rose strolls down the Thames, thinking quite hard, and sits on a bench to watch the zeppelins. One flies low over her head, Cybus logo stamped on the bottom, and her phone beeps. She takes it out and it says, "Welcome -- free trial period," so she presses a key and the news begins to play: Good news for Great Britain, as John Lumic returns to the country of his birth: "Mr. Lumic, the inventor of high-content metal, has denied allegations of ill health," or, as he puts it: "We're all flesh and blood, but the brain is what makes us human." Oh dear. Well, I see how this is going to go. Not that the robot brain/exoskeleton bullshit didn't make it obvious, but damn. "And my mind is more creative than ever," Lumic concludes. As the news reports on Cybus Industries stock doubling in price, and something about Torchwood, Rose looks up at the Cybus zeppelin and turns off the report.
The Doctor uncomfortably explains to Mickey that they're not even supposed to be there: "The TARDIS draws its power off the universe, but it's the wrong universe. It's like diesel in a petrol engine." Mickey protests that it happens in comics all the time, jumping tracks like this, but the Doctor just gives him a bitchy look: "Not in the real world." He reconsiders his approach: "Used to be easy. When the Time Lords kept their eye on everything, you could hop between realities and home in time for tea. Then they died, took it all with them. The walls of reality closed, the worlds were sealed." Loneliness. The space between. Ask Victoria: "Everything became that bit less kind." Mickey asks, then, how they've come to be in Steel. "I dunno," says the Doctor, tiredly. "Accident? Should've been impossible. Now we're trapped." There is a short silence without grace or hope in it, and then the Doctor spots something, a tiny glow below the console. Are they going to save the universe with a cuppa tea twice? That would be hilarious. It's not a reflection, not a trick of the light nor of optics: it's a tiny little light. That word I won't be saying anymore: that light you get on the other side of Hell, tiny and sweet and nearly singing, that says you're not alone as you thought. It's not a reflection of your need or your desire, or your fear: it's awesome in its own right. The Doctor remembers, then forgets: "Is that a light? I think that's a light! That's all we need!" And they have power again. They can go home again.