Re: Harry 10 and 12
"No. It's the Void." The Doctor said grimly, as the countdown continued in his head. "The emptiness between parallel universes, different dimensions and other realities. No light, no darkness. No temporal or spatial dimensions... Nothing naturally occurs here. Only things that have been condemned to the Void.
"But, perfect place to dump a big ol' brain altering, threatening 'fog' entity."