There are times when Will's face goes almost entirely slack and yet he radiates contentment. And there are times when a smile or laugh is startled out of him, like a sudden flash of a fish's tail breaking the surface of the water. Right now, Malcolm's words pull the second out of him, as he breaks into a bright grin.

And he doesn't have the words for a little while, but when he finally manages to school his smile a little, he replies, "Same here. I'm...really looking forward to exploring all sorts of crazy worlds with you."