Law & Order Season 24 Adds Ryan Eggold, Mariska Hargitay, and Elizabeth Marvel

Ryan Eggold will return to NBC with a guest starring role on Law & Order Season 24.

TV Line reports that Eggold will appear in an episode as Matt Riley, Det. Vince Riley’s brother. This casting marks Eggold’s return to live-action TV after his five-season run as Dr. Max Goodwin on NBC’s medical drama New Amsterdam.

He isn’t the only one joining Law & Order during its upcoming season. Deadline reports that Law & Order: Special Victims Unit’s Mariska Hargitay and Elizabeth Marvel will appear as guest stars.

Before Eggold’s appearance, Hargitay will appear as Captain Olivia Benson in an October episode. Marvel will reprise her SVU role as Attorney Rita Calhoun in the same hour. 

Marvel portrayed that role in more than a dozen episodes from 2010 to 2021.

The trio joins ER alum Maura Tierney, who joins Law & Order Season 24 as a series regular, per NBC Insider. Tierney will star as the new lieutenant.

Tierney’s character will take over after Camryn Manheim exited as L. Kate Dixon on Law & Order Season 23 Episode 13, “In Harm’s Way,” in May 2024.

Those aren’t the only casting shake-ups at the long-running procedural drama. Veep’s Reid Scott joined as a series regular on Law & Order Season 23 Episode 1, “Freedom of Expression,” in January 2024.

Meanwhile, after more than 400 episodes, Sam Waterston exited as District Attorney Jack McCoy on Law & Order Season 23 Episode 5, “Last Dance,” in February 2024. 

Scandal’s Tony Goldwyn joined the cast as DA Nicholas Baxter on Law & Order Season 23 Episode 7, “Balance of Power,” in March 2024.

He will return on Law & Order Season 24 alongside Hugh Dancy, Odelya Halevi, Mehcad Brooks, and Reid Scott.

NBC renewed Law & Order for its 24th season in March 2024. The series follows “the police who investigate crime and the district attorneys who prosecute the offenders,” per its logline.

As previously reported, Law & Order returns with Season 24 on Thursday, October 3, at 8/7c on NBC. It airs before Law & Order: SVU’s landmark 25th season premieres at 9/8c.

Dick Wolf is the creator and an executive producer of Law & Order. Rick Eid, Pamela Wechsler, Alex Hall, Arthur Forney, and Peter Jankowski are executive producers.

Universal Television, a division of Universal Studio Group, produces the series in association with Wolf Entertainment.

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Law & Order Season 24 premieres on Thursday, October 3, at 8/7c on NBC.

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