The TARDIS lands in what looks like an ordinary hotel (if kitsch 1980s style hotels can be construed as such), as the time-travelling drama continues. But the walls move, corridors twist and rooms vanish. There is a room for every visitor that contains their deepest, darkest fears. Fears that will kill them. What lies in the Doctor's room? And when his turn comes, will he welcome death like all the rest? David Walliams guest stars in this episode (yep, that's him there) written by Being Human creator Toby Whithouse.