Law & Order: Special Victims Unit

Head (5x25)

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After a video voyeur's hidden camera in a public restroom records a middle school principal sexually assaulting a teenaged boy, Novak learns that the pedophilia arose from a brain tumor that is successfully treatable by surgery, but can grow back, which they find out from another case.Novak agrees to a plea bargain, but only if the principal agrees to register as a sex offender, just in case the tumor grows back. She then finds out that she is pregnant and violates her plea bargain by contacting the boy and letting him know he is the father.