Code Black” is admitting two more cast members into the hospital.

Cress Williams will appear in the freshman medical drama in a recurring role, while Gail O’Grady will star in one episode with the possibility of her role expanding, series creator Michael Seitzman tells Variety.

Williams will play Marcia Gay Harden’s potential love interest, Seitzman alludes, adding that he and the creative team met the “Hart of Dixie” actor early in the pilot casting process, but didn’t find the right role for him at the time so they created this part.

“Essentially, he’s playing a character whose job is Leanne’s (Harden) job, the head of the residency program but for the other shift so she’s on 12 hours and he’s the other 12 hours,” Seitzman says of Williams’ character. “He’s real competition to her, but what we’re hoping it develops into is possibly a love interest for her. If all goes the way we’re hoping, we’ll be able to develop a story that doesn’t interfere with our own backstory and doesn’t get in the way of our larger drama.”

As for O’Grady, the “NYPD” alum plays the mother to a drunk driver in a tragic situation. “Honestly, it was probably the most blistering performance I have seen in years, as the mother of two sons,” Seitzman says.

Elaborating on the storyline, he adds, “They come in from a drunk driving accident, caused by one of the brothers…what transpires throughout the episode is this remarkable performance by this three-time Emmy nominee.”

Though she’s only filmed one episode, O’Grady could return.

Seitzman teases, “She was so exciting, so electrifying, that we spent a lot of time in the writers’ room trying to figure out how we can bring her back.”