In the episode, titled "Forty-One Witnesses," Ramos makes his series debut as an accused rapist, and Diggs returns to the role of Counselor Henderson that he originated last fall.
The show has showcased many Broadway veterans since it premiered in 1999, including BD Wong, Raúl Esparza, Judith Light, Daniel Sunjata, John Cullum, Jayne Houdyshell, Laura Benanti, Andy Karl and many others.
The episode is scheduled for 9 PM (ET) Feb. 3.