"True. Priorities." Jack nods firmly. "But we can't lose sight of the bigger mystery here. If even anyone can get a handle on what it is that's bringing us here? Or what's creating the doppelgangers. Even if it looks like magic to them? The people here certainly define it as magic. But I'd probably recognize it as some sort of technology."

"I can think of-" Jack tilts his head to the side and counts silently, then gives up, "okay, I can think of quite a few races with both dimensional shifting tech and either cloning or genetic mixing tech, they'd have the ability to do both the things that we're seeing."