The CW network have released the official episode description for "Action"
The residents of Smallville are thrilled when “Warrior Angel,” a movie based on a comic book, begins shooting in town. However, after the lead actress, Rachel Davenport (guest star Christina Milian) takes off in stunt car with cut brakes, Clark must step in to stop the runaway car. Unfortunately, an obsessed fan witnesses this heroic event and decides Clark is a real life superhero, whose girlfriend Lana must be eliminated so Clark can fulfill his destiny. Meanwhile, Lex discovers Lionel at the cabin.