In "Trajectory," the next episode of "The Flash," there's a new speedster in town and she's up to no good. A new clip from the episode reveals that her speed is Velocity-9-fueled, and she's willing to kill in order to get some more. In a second clip, Barry expresses his frustrations to Harrison Wells that other speedsters are using V9 for a boost -- and he's considering using it himself, despite its life-threatening properties.

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THERE IS A NEW SPEEDSTER IN CENTRAL CITY; WILL THE FLASH BE ABLE TO KEEP UP? - Deciding to blow off some steam, Barry (Grant Gustin) and the team head out for a night on the town only to encounter an unexpected speedster who is up to no good. Iris (Candice Patton) is challenged by an assignment

Starring Grant Gustin, Carlos Valdes and Jesse L. Martin, "The Flash" returns Tuesday, March 22 at 8 pm EST on The CW.

(via Entertainment Weekly)