Hermes' mailroom looks very similar to the Traverse Town mailroom
During the scene in when Percy, Annabeth, and Tyson visit the OPS, after listening to Percy and Annabeth talk excitedly, Hermes (Nathan Fillion) smiles and comments how he likes the way the two of them finish each other's sentences. This is a reference to Castle in which characters Rick Castle (Nathan Fillion ) and Kate Beckett are often finishing each other's sentences when working together. Many other regular characters and guest characters in the show have commented about them finishing each other's sentences throughout the show's run.
The fight with Kronos up to Percy riding up his arms and hands is somewhat reminicent of the fight between Sora and Darkside in the game
During the scene in Washington, D.C. when Percy, Annabeth, and Tyson visit the OPS, Hermes gives them a thermos from the television show "Hercules Busts Heads." When Tyson remarks that is was a fantastic show, Hermes replies that it was the best show, which is why it was cancelled after one season. This references Firefly, the T.V. show in which Nathan Fillon (Hermes) starred in that was cancelled after one season.
Car that splits in two lengthways while driving
Clarisse Holds up her token in the style of Tron from the movie
movie is reviewed
The film was talking about the the trailer was shown.
Mentioned in dialogue