The Doctor pulled him into the forest, which, even right at the edge, seemed impossibly thick and deep. The black trunks shone with vibrant mosses, and the leaves rustled with unpleasant-sounding creatures.

"I'll walk ahead," the Doctor said. "Keep an eye out for things you could step on."

He was loathe to lose the support of Jack's arm, but he would've been worse off with Jack dead or worse from something in this place. The Doctor took carefully placed steps ahead, one foot in front of the other.

"More of those insects, but they don't look so docile," he warned.