I can't say that I know. [He sounds just a little breathless. It would be too risky to try to look over his shoulder right now. He guns for the tree line as fast as he can, but he won't use more fuel to do so. He has to conserve. They have to get out of here.]

Kate. I'm going to focus on getting us to that town. If you see anything, please tell me right away - the direction and what you saw, as quick as you can. [His voice is gentle, but it's urgent, too - serious.

[With that, he continues on toward a new edge of the tree line, merely trusting that it's the one that will get them there fastest.

[Without any interference, it will only take a few more minutes.]