Rachel McAdams appears as Riley's bulimic sister in a season 3 episode.
Shawn Ashmore plays a guy Kayla goes out with named Chet in Jett's "Groundhog Day" Loop. His twin brother Aaron appears as an unrelated character.
Ashmore's Animorphs co-star Brooke Nevin was in an episode as well.
Jett Jackson himself, Lee Thompson Young, better known for his character on Rizzoli & Isles.
Trailers Always Lie: It was common for advertisements to only showcase the "Silverstone" part of the show, making the show look like a spy series. One can only imagine the reactions of people who were fooled by this, and then saw the actual show.