Law & Order: SVU is known for having its fair share of great guest stars, but this one holds a special place in our hearts. Anthony Edwards will appear in the Oct. 26 episode of the NBC procedural — and we have the first look at his anticipated ER reunion with Mariska Hargitay!

Before landing the role of Olivia Benson, Hargitay recurred on the fourth season of ER as Cynthia Hooper, an inexperienced, needy desk clerk who had a brief relationship with Edwards' Dr. Greene. And in the upcoming SVU episode "Rape Interrupted," Edwards will play Benson's very first partner out of the Academy, Sgt. Patrick Griffin.

But when Griffin's son is accused of rape, Barba (Raul Esparza) questions whether Benson's past with Griffin is influencing the investigation.

Check out an exclusive first look at the episode below! And don't miss Edwards' SVU guest appearance on Wednesday at 9/8c on NBC.