Of course she has reason to be suspicious, but Klaus isn't in a great state of mind to think of something like that and announce himself. He's going to see Julie, and it's such a familiar thing that he doesn't even really consider how knocking on her door in the middle of the night might be just a little bit unnerving.

When she answers the door, looks up at him and frowns, reaches for his hand and takes his wrist, asks him what's wrong, and he laughs breathlessly.

"Oh my god, so much. Can I come in?"