Doctor Who is not entirely a steampunk show, nor has it ever been. Still, the element of time travel is one that steampunk often employs, and what television program is more time travel oriented than Doctor Who? To that end, Doctor Who winds up having steampunk elements in it as the aesthetic of time travel media and fiction have changed and grown more steampunk-oriented. There are artists devoted to creating steampunk-esque Who costumes and props. The TARDIS itself in its Eighth and Eleventh Doctor years has sported more of a gears-and-machinery look and a more Victoriana-influenced look (sandwiching a rather living-organic spaceship style used by the Ninth and Tenth Doctors that was more Farscape than steampunk). In the era of “new” Who (2005 and beyond), there have been clockwork robots, steamships, and absinthe-soaked romps through 1890s Europe. The Eighth Doctor looked quite like Lord Byron and even had his own Frankenstein’s monster-style regeneration (though it’s a bit early in the Victorian era, there is definitely an affinity amongst some steampunk afficianados for the Byron/Shelley literary group). And even in its older eras, Doctor Who has employed an aesthetic full of clocks and levers, hourglasses and flowing frock coats. If we one day found out that the TARDIS itself somehow ran on water vapor, I doubt any fans would be terribly surprised.