[Waverly takes him all the way upstairs to the small, above-the-bar apartment, and once they're inside, she takes a deep breath.]

So. The Ghost River Triangle sort of has this barrier around it.

[Might as well get to the point.]

Humans and part-angels can pass through it just fine, but when Julian went through it he lost all his memories and forgot he was an angel, and demons ... well, let's just say they're highly discouraged from leaving the Ghost River Triangle.

[To the point where they might get more than a little burned.]

Have you noticed if any of your Hell changes hung around?