Directed by: Chris Columbus
Starring: Pierce Brosnan, Sean Bean, Rosario Dawson, Catherine Keener, Steve Coogan, Uma Thurman, Logan Lerman, Kevin McKidd, Brandon T. Jackson, Melina Kanakaredes
Continuity mistake: During most of the movie, Grover's legs have brown fur. But in Tartarus, Grover's legs has black fur and when Grover asks "What's different about me?" he has gray hair.
Suggested correction: In the movie (at least from the various times I have watched it) Grover never goes to Tartarus, please correct me if I am wrong but this just doesn't make sense.
Continuity mistake: When the bus passes Poseidon and he disappears, the people walking near him also disappear. There is an Asian couple walking from left to right across the shot that should have been still there after Poseidon is gone. Sloppy SFX that sort of spoils the effect of a god being able to vanish.
Chiron: Use this to defend yourself. It's a powerful weapon.
Percy Jackson: This is a pen.
Chiron: Only use it in times of severe distress.
Percy Jackson: This is a *pen*.