Captain Jack stands behind Rose and the Doctor, staring at Jamie. "Okay, on my signal make for the door. ...NOW!" The Doctor pulls out a lovely ripe banana and points it at the child, and grins. He points Jack's purloined blaster at the wall and opens up another square. Why shoot the child, when you can shoot the wall and escape? Why not buy some time? Why violence, when the child's not really the problem? Why add to the deaths? Why shoot a gun at inevitability, when your whole life is constellated around the ability to escape and regroup? The Doctor: "Go! Now! Don't drop the banana! Good source of potassium!"
Out in a hallway, the child approaches the square door. Jack takes his blaster back and seals the hole: "Digital rewind." He tosses the banana back to the Doctor and compliments him on the switch. The Doctor: "It's from the Groves of Villengard. I thought it was appropriate." Captain Jack realizes that the Doctor wasn't kidding about the banana grove, or the fact that the Doctor totally dosed the Factories, and that the Doctor's never kidding, even when he is. The Doctor says, quite simply, "Bananas are good." The child starts to come through the wall.
Down the hall, the masks are awake again, calling "Mummy" and staggering. One of them is pushing another one in a wheelchair, which for some reason is the funniest thing. Lots of Who running about, and they're back where they started, Jamie coming through the wall for them. "It's keeping us here so it can get at us," says the Doctor, and explains that the child is in control of everything now -- that, in fact, it is every living thing in the hospital. Captain Jack explains that his blaster is also "a sonic cannon and a triple-enfolded sonic disruptor," and asks what the Doctor has. The Doctor pulls out his screwdriver, which Jack is too busy wiggling his blaster at the masks to see. It's rather small. The Doctor: "A sonic, er...oh, never mind. It's sonic, okay? Let's leave it at that." Jack pushes, and the Doctor won't say, because he's now had his hands on Jack's blaster at least twice and knows how large and hefty it is. "It's sonic! Totally sonic!" Captain Jack finally turns around for a look when the Doctor admits it's a screwdriver -- and the child bursts through the wall. Who needs a gun when you've got a screwdriver? Who needs to shoot when you can build? Why violence when violence doesn't solve mysteries? The Doctor's not a pacifist in the usual way; he just knows timespace in the Einsteinian sense: all of a piece. This time, Rose grabs the blaster, and opens a hole in the floor, another lateral move away from the fight, because the fight's not the problem and it's not the solution. She shouts, "Going down!"