The episode will focus on abused rape victims played by Michael Gladis and Kevin Alejandro.
Grier received Tony nominations for Race and The First. He has also appeared in A Funny Thing Happened on the Way to the Forum, Dreamgirls, The Wiz and A Soldier's Play. He is known for his TV appearances, including "Chocolate News" and "In Living Color."
The twelfth season of "Law & Order: SVU" premieres Set. 22 at 9 PM ET on NBC.