The bar Banshee is a nod to Cinemax's show Banshee which was also created by Jonathan Tropper.
The saloon/bar is called Banshee Cinemax made a series with the same name that started in 2013 and ran for four seasons. This episode also has a cameo from Hoon Lee, who played Job in Banshee
When Bill O'Hara is promoted to sergeant, he is handed a list of men that will work under him in San Francisco's Chinatown. The last two names on the list are "Stone" and "Keller". These are the names of the two detectives in the 1970's television show, "The Streets Of San Francisco" played by Karl Malden and Michael Douglas.
The Earth quake did not hit San Francisco until 1906 way after the events take place .