Felton will play Julian Dorn, a fellow CSI at the Central City Police Department who suspects there’s more to Barry Allen than just his good guy reputation.

The English actor is best known for portraying cunning sorcerer Draco Malfoy in all eight Harry Potter films, from 2001’s Harry Potter and the Philosopher’s Stonethrough to 2011’s Harry Potter and the Deathly Hallows: Part 2. On the TV side, he co-starred the first season of TNT’s anthology drama Murder in the First and has had roles in DirecTV’s Full Circle and the historical miniseries Labyrinth.