River can't help but chuckle. "Oh, I can imagine." She's been a part of some of those more exciting moments. But she'd have to agree there's something to be said for not having anything to rush back to.

"The very one." She smiles, and it almost reaches her eyes. "I led an expedition there after Darillium. The pay was fantastic and you know I can't resist a mystery."

And if she'd hoped she might see the Doctor again, well, can he really blame her?

"No one had been for 100 years, quarantine protocol. I sent a message to the Doctor, but he got it too early. He didn't know me yet." Her expression darkens slightly. "Usually that wouldn't be a problem. But you know how he is. He can't stand losing."

And her husband still isn't any good at saying goodbye.

"I died. Saving him, naturally. And he uploaded my consciousness into The Library's core."