Dean: I'm guessin' he's gonna whip up another of those blood spells and Marty McFly himself back to the 1960s.
Referencing the Back to the Future movies (1985) starring Michael J. Fox as Marty McFly, a teenager who travels through time using his mentor Doc Brown's (Christopher Lloyd) time-traveling device, mounted in a DeLorean. Marty goes back to when his parents first met, similar to what happens here with Dean. Also, the scene where Dean first encounters his dad at a diner is a near reenactment from the movie. In it, Marty was unaware that the man next to him was his dad, until someone called their last name and they both turned around. And the man that visits Lydia is Dr. Brown.