Through the last tiny gap between universes, on a bleak, windswept beach called Bad Wolf Bay, they look at each other for the last time, able to see and hear, but not to touch. It’s breaking their hearts in ways neither of them ever imagined.
The Doctor’s burning up a sun to buy them these few, brief moments; there’s just time to say goodbye, but it’s not enough, can never be enough. After everything they’ve been through together, how can they survive being ripped apart?
The gap snaps shut, leaving them both in tears, the way between universes closed forever.