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September 08, 2016 at 08:15 PM EDT

Anthony Edwards will guest-star on Law & Order: Special Victims Unit in season 18, EW has learned.

Details on his role were unavailable, but the casting marks a reunion for Edwards and Mariska Hargitay, who co-starred on NBC’s long-running medical drama ER — she played a love interest for his character in season 4.

Edwards joins other season 18 guest stars, including Vice President Joe Biden, who will appear as himself, as well as Henry Thomas (E.T.) and Kelli Williams (Lie to Me), who guests in an episode inspired by Making a Murderer. Get the scoop on season 18 from new SVU boss Rick Eid here.

Law & Order: Special Victims Unit returns Wednesday, Sept. 21 at 9 p.m. ET on NBC.

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