La Salle and Phifer are joining Tierney for an episode of the NBC procedural, where she plays Lt. Jessica Brady ...

Tierney, who plays Lt. Jessica Brady, was joined on set by fellow ER alums Eriq La Salle, who directed the episode, and Mekhi Phifer, who will guest star as suspect Lyman Ross. PEOPLE has an exclusive ...

I wouldn't rule out Eriq La Salle directing again, though, as he's been prolific across the network TV Dick Wolf shows, as well as acting, producing, and directing On Call, Prime Video's streaming ...

Maura Tierney as Lieutenant Jessica Brady, Mekhi Phifer as Lyman Ross in "Greater Good" ...

The star-studded cast includes Troian Bellisario from Pretty Little Liars, Rich Ting of Squid Game fame, Brandon Larracuente from 13 Reasons Why, Lori Loughlin of 90210, and Eriq La Salle from Logan.

Alex Kingston, Eriq La Salle, Julianna Margulies, Innes, Clooney and Wyle were among the original cast who returned for guest appearances in the final season. Perhaps best of all, though ...