"It's crumbling from above, Jack, we have to go down!" The Doctor grabbed Jack's arm and gave him a tug downwards. At the very least, they could get to some sort of temporary safety and use Jack's wrist strap to get out. But for right now, down was the only way to go.

Jack grew dimmer in the light, until they were in darkness surrounded by moving darkness. The Doctor thought of the Hub, of being under where that submarine was. Death loomed there for them, too.

"Come on," he said. "I've got you, Jack. We will get out of this."

he hoped.