He barely hears the knock over the music, but Hansel does hear it. He looks over his shoulder at the door and is a little surprised to see Lydia. When she hadn't come in at her usual time he had been a little worried she was a busy woman. She didn't need to stop by all the time.

He shoves the mop in the bucket before he goes over to the door and taps the glass to get her attention.

"Gotta come back tomorrow, Red."