James Iha, ex-guitarist from smashing pumpkins does all the music scores in season 1.
Season two and season three both premiered on April 20th (4/20) - a reference to marijuana.
James McAvoy is referenced multiple times.
Tyler Labine's character, Pac, shares the name with the eponymous Pac-Man, who spends some of his time in his game being chased by ghosts.
Shares a very similar plot line to Dead Last (2001), also starring Tyler Labine as a guy who can communicate with ghosts and help their unresolved problems. Birkett Turton also appears on both shows.