According to his wristband, the first three digits of House's social security number indicate that he applied for it in Ohio (where he is presumably from). The wristband also shows his date of birth as June 11, 1959 - Hugh Laurie's actual birth date.
According to the DVD commentary, by the end of filming the scene where House runs a robot limb along Cameron's body, even some crew members were blushing.
Another reference to Sherlock Holmes happens in this episode: The man who shoots House is called Moriarty, although he is not identified as such (the name is taken from press materials and the script).
The taco stand "The Cactus" is located at Beverly Boulevard and North Harvard Boulevard in Los Angeles. The address is 4370 Beverly Blvd, Los Angeles, CA 90004.
Jesse Spencer and Elias Koteas appear together in several crossover episodes of Chicago Fire and Chicago P.D.