Jessica, Gus's latest crush, is played by Nicole Lyn, who was Dulé Hill's real-life wife at the time this episode was filmed.
In the credits there is a listing for "Harold as himself." Much of this episode was filmed at the The H.R. MacMillan Space Centre in Vancouver. "Harold" is the nickname of the facility's planetarium projector.
Spot the pineapple: in the final scene, a guy can be seen walking past wearing a green shirt with pineapples on it as the camera pans to Henry.
When Gus starts talking to Jessica he says, "You heard about Pluto? That's messed up right?" This is a reference to the decision a few months before then where the International Astronomy Union decided that Pluto would no longer be considered a planet and would be thereafter a dwarf planet.
This is the first time Juliet sees Shawn showing any maturity and genuine concern for others. This also seems like the first time there is a bit of a spark between Shawn and Juliet.