Curtis Armstrong Curtis Armstrong

Revenge of the Nerds and Moonlighting star Curtis Armstrong has landed a multi-episode arc on The Closer's seventh and final season, has learned exclusively.

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Armstrong will play Peter Goldman, a resourceful attorney hired by the mother of a slain gang member to sue Brenda Leigh Johnson (Kyra Sedgwick

) and the Los Angeles Police Department. As we first reported, the character is smart, fearless and devious; he makes a natural sparring partner for Brenda."He's going after her, the city and the department," creator James Duff tells "He is a wily attorney who's made a profession of suing the police. ... [He] shows up every time someone gets shot and files papers. He would say he's a necessary part of the justice system — he's making the police justify their tactics and holding them to the standards our constitution demands."

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Luckily, Brenda has her own secret weapon: Lost and Supernatural star Mark Pellegrino will play her ruthless, high-powered defense attorney.Armstrong is perhaps best known for his role as Booger in Revenge of the Nerds and his recurring role as Herbert Viola on Moonlighting. His other film work includes appearances in Risky Business and Ray, and he's also guest-starred on such TV shows as Grey's Anatomy, House and Boston Legal. He also voices the character Snot (a parody of his Nerds character) on Fox's animated comedy American Dad!

The Closer
premieres Monday, July 11 at 9/8c on TNT. Armstrong's first episode, titled  "Forgive Us Our Trespasses," is slated to air Aug. 8.