S2, E20: Clark inadvertently witnesses the robbery of a LuthorCorp truck carrying kryptonite and is stunned to realize that he can't stop the thieves -- they are as strong as he is. To keep Clark from telling the police, the thugs attack Jonathan and Martha, leaving Clark feeling powerless and desperate for a way to protect his parents.
Starring Zachery Ty Bryan, Camille Mitchell, Woody Jeffreys