At the end, Clara seems none the worse for what's happened, although she does feel a bit tired and doesn't understand why. "Do you feel safe?" the Doctor asks her. "Of course," she says. She assures him she's fine and looking forward to their next madcap adventure or whatever. And if she doesn't, maybe they could stay in for the next thousand million evenings or so. The TARDIS has an amazing library, a swimming pool, its own star and an infinite number of rooms. It's like having the whole universe right there, with the added benefit of a clean bathroom guaranteed to be within reach. Going back to visit the Cretaceous is fine and dandy, but good luck finding a safe place to pee.
Tippi Blevins is a freelance time traveler. She dropped by 2013 to write this weecap. Email her at email@example.com, or find her @TippiB.