Board Thread:The Panopticon/@comment-25566332-20140115180525/@comment-4028641-20151117161330

That one's simple. It was first released by itself as an awkward skit where the Doctor talks to the camera for two minutes without any sound. It appears in the Proms and by all accounts that's the version worth watching where you can see all the action and the interactive element, but that's not the version that we consider valid.