Messing will play a television journalist who crusades against pedophiles and is helped by Detective Benson (Mariska Hargitay) when one of her possible targets stalks her.
Messing received an Emmy Award for her work as Grace Adler on the sitcom "Will and Grace." She appeared in the Manhattan Theatre Club productions of Collected Stories and Three Dogs and a Bone, and in the WPA production of The Naked Truth. She recently starred in the USA series "The Starter Wife."
"Law & Order: SVU" airs Wednesdays at 9 PM ET on NBC.