At 8:42 Nick knocks on door #304. 3rd season, 4th episode.
The last line of the episode Nick says "Nobody is, Jake. It's Portland." May be a play on the famous line from the film Chinatown. The last line in the film is "Forget it, Jake. It's Chinatown."
The girl who saves Jake from drowning is a lot like Ariel from the Little Mermaid. She is a Naiad, similar to a mermaid. She does not speak, just like Ariel when she lost her voice.