Jessica Walter on SVU: An Arresting Development

Kooky matriarch Jessica Walter (90210, Arrested Development) will guest-star in an episode of Law & Order: Special Victims Unit in the fall.

TVGuide.com has confirmed that Walter will appear in the third episode, which is titled "Solitary," as a legal-aid powerhouse named Petra Gilmartin. She will have scenes with ball-bustin' new ADA Christine Lahti and Oscar nominee Stephen Rea, who also guests in the episode.

Walter joins an already impressive list of guest stars who will pop into SVU this fall, including Lahti, Rea, Prison Break's Wentworth Miller and Will & Grace's Eric McCormack.

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