Tisdale's character will be the roommate of a girl played by Aly Michalka from the movie "Bandslam" in the Wednesday-night drama that will debut in the fall. The CW has one other new series, "Nikita," about a young woman seeking revenge after being trained as a spy and assassin as a teenager.
The network also said Thursday the Superman drama "Smallville" will have its 10th and final season this year.
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