Tyrell (Martin Wallström) and Joanna (Stephanie Corneliussen) don't speak the same language: He speaks Swedish and she speaks Danish. The languages are both so similar that native speakers normally can carry on conversations the way Tyrell and Joanna do (The closed captions incorrectly identify both languages as Swedish).
During his hallucinations Elliot (Rami Malek) sees Error 404 Not Found error message in the place where a house moments ago was standing. 404 error message is an H*TP standard response code indicating that the client was able to communicate with a given server, but the server could not find what was requested, referring to the house that Elliot was looking for.
Romero (Ron Cephas Jones) breaks the fourth wall when he says "right now some writer's working hard on a TV show that'll mess up this generation's idea of hacker culture" referring to the show.
A 1995 movie Hackers (1995) plays on the motel television. The movie follows the exploits of a group of gifted high school hackers and their involvement in a corporate extortion conspiracy which mirrors Elliot (Rami Malek) and fsociety actions in the show.
The license plate dqf-8093 on the stolen minivan was used in Rescue Me (2004) and Person of Interest (2011).