The photos of Sam and Dean in Mary's home are real photos of younger Jared and Jensen.
This is the first time the Impala is seen with Ohio license plates instead of Kansas plates. Sam explains this was done due to their fugitive status.
The scene where Dean breaks into the house to steal the silverware and Sam interrupts him is a throwback to a very similar scene in the beginning of the show's pilot episode, even including some of the same dialogue.
The word "djinn" translated from the original Arabic actually stands for both a wish-granting genie and for a demon as well.