The license plate on Jennifer's Jeep is 617-508, the two main area codes in Massachusetts.
The guy in the bar who asks the waitress for a Screaming Orgasm is wearing a Kappa Tau Gamma T-shirt. Kappa Tau Gamma is the name of one of the fraternities in the show Greek.
When Lexie asks William if he was a cop he responds, "Not even a little." Colin Ferguson had just played a town sheriff in another SyFy Channel series, Eureka for five seasons.
Most of the books that appear in the book store are from book imprint Hard Case Crime. This is the company that originally published Stephen King's The Colorado KId the book that Haven is loosely based on.