When David is first talking to Grace, the lights reflected in his eyes are in the shape of crosses.
The movie playing on the television in David's room is War of the Worlds (1953).
When Ben creates his avatar for Haunted Girl, the first voice in the modulator is Natasha Lyonne.
With 3.10 million viewers, this was the least watched episode of Season 1.
Tara Summers and Mike Colter were previously on Ringer (2012) together