Dr. Maggie Aderin-Pocock: Travelling from our star to our next-door-neighbour star, proxima centauri, travelling at ten and a half miles a second, will take seventy-six thousand years! So even if there is life out there, the problem is getting out there.
Karen: Yeah, which is why I wish the TARDIS was real.
Me too, Karen, me too.
From Doctor Who Confidential, Series 5 Episode 11: Extra Time