Whenever the TARDIS touches down in London, it's always in what would have been then contemporary London. So when the TARDIS arrives in London for The War Machines, it's the swinging London of 1966. While the Doctor finds himself drawn to a newly constructed communications tower, Dodo just wants to hit up the hottest night club she can find. There's a lot that could be said about the poor treatment that the Doctor's female companions have so far received on the show, but that's probably better left to someone much smarter than myself. But basically, after the Doctor cons his way into seeing WOTAN, the most technologically advanced computer in existence (like a sixties Skynet), Dodo is hypnotized. After the Doctor figures out that she's under WOTAN's influence, he hypnotizes her again causing her to pass out. Dodo is then sent to the countryside to recuperate and she's only heard from again at the end of the serial when the Doctor's new companions tell him that Dodo has decided to stay behind in London. And, just like that, Dodo's short, unfortunate run on the show comes to an end. The rest of the serial is fairly decent, with the Doctor and his new friends fending off WOTAN's hypnotized underlings and some boxy robots. There was one thing did irk me in particular though, WOTAN repeatedly refers to the Doctor as "Doctor Who," the first and so far only time anyone has explicitly called the Doctor "Doctor Who."