It's a question he has been asking himself. The alternative is to stay on this ship like everyone else except there is no door for him. He would be here, stay here so it's all he can think to do to move things forward.

He nods with a tiny smile. She's smart to think of it in that way.

"Plenty of questions." There's a slight pause as he releases a breath. "Why are we here? What is this universe? How can we control the door? Some people never want to return to where they're from on the other side of that door, there may be a way to make that happen."