LOS ANGELES (AP) — A significant legal development has emerged from a California appeals court, allowing a lawsuit initiated by the widow and estate of "ER" creator Michael Crichton to advance. The lawsuit alleges that the HBO Max series "The Pitt" is an unauthorized reboot of "ER," the acclaimed medical drama that aired from 1994 to 2009. The appeals court ruled unanimously that the lawsuit has sufficient merit to proceed based on similarities between the two shows.

The ruling by a three-judge panel from California's 2nd District Court of Appeal was delivered on Wednesday. The panel concluded that the trial court was correct to dismiss a motion by Warner Bros. Television, which produced both "ER" and "The Pitt," to have the case thrown out. However, the judges dismissed Noah Wyle, the star of both shows and a producer on "The Pitt," along with two other producers who had worked on both series, as defendants in the case.

This lawsuit represents a clash of two prominent Emmy-winning television series, both of which have played significant roles in the evolution of medical dramas on television. Michael Crichton, the author renowned for creating works such as "Jurassic Park," wrote the pilot script for "ER," a show that redefined the medical drama genre and captivated tens of millions weekly during its run.

Sherri Crichton, Michael Crichton's widow, filed the lawsuit two years ago, prior to the airing of any episodes of "The Pitt." Following its debut, "The Pitt" has garnered critical acclaim, winning two Emmy Awards for Best Drama in its first two seasons and two Best Actor Emmys for Wyle. The series portrays a real-time account of a day in the life of a Pittsburgh emergency department, further complicating the narrative around its alleged similarities to "ER."

As part of their decision, the judges had to evaluate whether the two shows exhibited enough similarity to justify the lawsuit's progression. Their ruling pertains only to the initial legal challenge, without addressing whether the plaintiffs have successfully proven that "The Pitt" is derivative of "ER."

The court acknowledged that both shows offer commentaries on the healthcare system, focusing on the emergency room and the challenging conditions faced by medical staff. Notably, the court highlighted that both series primarily take place in the emergency room, contrasting them with other medical shows that tend to track patients beyond the emergency setting. This focus creates a shared thematic backbone, lending credence to Sherri Crichton's allegations.

Moreover, the judges noted stylistic similarities between the two series, emphasizing the fast-paced dialogue and the depiction of multiple overlapping crises. Both shows employ a rapid narrative style, filled with medical jargon and shorthand that conveys a sense of immediacy and realism.

In response to the ruling, Warner Bros. Television issued a statement asserting that "The Pitt" is an original series and that claims against it lack merit. The studio expressed confidence in its position and looks forward to defending itself as the case continues. The defendants maintained that the similarities highlighted are generic and could be found in any dramatic portrayal involving overworked doctors and staff.

Alongside the primary ruling, the panel unanimously dismissed Wyle, John Wells—who created "The Pitt" and contributed to "ER"—and R. Scott Gemmill, an executive producer on "The Pitt," from the lawsuit. The judges found insufficient evidence to suggest these individuals were aware of the contractual provisions that the lawsuit claims they interfered with.

Sherri Crichton's lawsuit contends that "The Pitt" is essentially a rebranded version of a previously rejected unauthorized "ER" reboot. Michael Crichton had secured a "frozen rights" provision in his contract for "ER," which prohibited Warner Bros. from developing any sequels, remakes, or derivative productions without consent from him or his estate following his passing in 2008. After failing to reach an agreement with Sherri Crichton over a potential "ER" reboot, Warner Bros. allegedly moved forward with the development of "The Pitt" without proper authorization, prompting the legal action.