This episode marks the debut of Cactus Pete, Cactus Polly, Sammy Starfish, and Andy Pumpkin.
Andy Pumpkin makes a cameo appearance in Johnny's Snow Cone Shop. His official appearance is in "Big Banana".
When everyone yells "Surprise" and "Happy birthday" to Henry near the ending, Roderick's mouth is shown moving. However, in later episodes, his mouth only moves if he changes expressions. It could be possible that Roderick was originally going to have a voice actor or it could just be an animation error.
Goofs[]
When Henry enters the dark room, the switch is flipped up instead of down.
When everyone yells, "Surprise!", Egbert and Leo appear before bringing out the cake.
When everyone dances, Roderick has a party hat on.