'But he's here?' Charley still can't entirely take it in. 'I mean, he's outside the TARDIS, in the, you know, the positive universe, and he hasn't destroyed it?'

She hadn't thought that was possible. At least, the last time, Romana and Rassilon and the TARDIS had all been adamant that Zagreus could never be allowed out into the universe, that even if he had no intention of destroying it, the antitime fundamental to his being would rip causality apart merely by existing within it.

Calming down from the shock somewhat, she takes her tea back from the Doctor and takes a long, calming sip. 'How is that possible?'