Bill's features grow sterner, and he shakes his head.

"You can call me. You can't just go in blind, Kate. There's no real tellin' what's goin' on over there."

Any bad thing you can imagine, Raylan had said, and Bill doesn't want her anywhere near that.

"The door isn't even reliable right now. Raylan is from Kentucky in 2010, we got no idea how he ended up here, or where the door might take you if you used it."