Asquith says -- now that the disposition of the brandy is through with, thank you very much -- the Slitheen will now "end this hunt with a slaughter," and flexes his creepy claws. The Doctor folds his arms, so you know he's still ahead of the game and Rose asks if maybe they shouldn't run away quickly, as the Slitheen move forward. The Doctor talks about the "fascinating history" of Downing Street: "Two thousand years ago, this was marshland. 1730, it was occupied by a Mr. Chicken. He was a nice man. 1796, this was the cabinet room -- if the cabinet's in session and in danger, these are about the four most safest walls in the whole of Great Britain." He presses a switch near the door: "End of lesson." And blast doors immediately seal every entrance of the room. Which is admittedly bad-ass, but now my worst nightmare is to be stuck on an historical tour with his ass, because you know he can't help himself. Is there anything more awkward than when even the docent wants to smack that guy? With her bony little hand? The Doctor turns to his compatriots: "Installed in 1991. Three inches of steel lining every single wall. They'll never get in." His satisfied smile doesn't fade even as Rose asks how the hell they're supposed to get out, but he does spare a somewhat disappointed "Ah."
Outside, Green makes his orders: cut off all communications from the lockdown room, summon the rest of the Slitheens, and finish with "this insane planet" for good. Everybody takes off.
Jackie and Mickey escape through a side door and take off, evading the cops still placed around the building. Stealthy!
A TV reporter tells us that "there's still no word from inside Downing Street," and various middle-ranked officials -- some of whom are funny, all of whom are overweight and, one can assume, farting -- are arriving all the time, and nobody can figure out why. "Group Captain Tennant James of the RAF," "Ewan McAllister, Deputy Secretary for the Scottish Parliament," "Sylvia Dillane, chairman of the North Sea Boating Club." Firstly: "Chairman"? Awesome. And secondly: didn't the Sugar Czar showing up last week tip you off? Somewhat totally unnecessary is his last word: "Quite what connects these people, we have no idea!"
MI-5 Margaret greets Tennant James, in high spirits: "Group Captain! Delighted you could make it!" He passes gas, and her delivery is such that I don't really mind it: "That's the spirit, off you go!" There's such a "well done, Tennant" in her voice that it's pretty funny. She greets McAllister and Dillane, and they all begin to gather. Asquith stops the Sergeant and says that -- now the Doctor's been neutralized -- they're cutting off the upper levels for everyone. The Sergeant, cute in a Full Monty kind of way, asks about the three new guys, and Asquith changes the subject, asking the guy to "liaise with Communications," because "the acting Prime Minister," Joseph Green, "will be making a public address...to the nations of the world." I like the writing here, as the aliens begin leaving more and more of the subterfuge out, since it doesn't matter, because they're about to go public anyway. The Sergeant stands there, confused as all get out, as the aliens retire upstairs.