Research. He can do research. If there's a way back he will find it, with or without these two, and this is the best place to do it. Tom glances around. At all the books, all the knowledge he can practically breathe in. From a strategic point of view it's sensible to play along, to not turn his back on these resources.

"... Alright." He nods. "I'll be your Guardian."

Still, it feels wrong to lie. Or at least to not play his cards straight to a certain point. "But just so we're clear, the moment I find a way back? I'll take it. I'm out of here." He glances down at the lines on his hands, back up at Jake. "And I won't look back."