CBS All Access will keep fighting The Good Fight.

The streamer has renewed its drama series for a fourth season. The spinoff of CBS' The Good Wife was the first original series to launch on the service and remains its longest-running one.

"The Good Fight is in the middle of an incredible third season and continues to be a flagship original series for the service," Julie McNamara, executive vp original content, CBS All Access, said Tuesday in a statement. "Its visionary creators, Robert and Michelle King, and the extraordinary cast continue to explore the cultural climate with insight, humor and courage, and we can't wait to see where these indelible characters go next."

The pickup comes midway through the show's 10-episode third season, which releases new episodes weekly on Thursdays. The season finale is scheduled for May 16. A date and episode count for season four aren't set.

The Kings have taken on real-world politics in heavy doses in the current season, with Diane (Christine Baranski) and Liz (Audra McDonald) joining the resistance to the Trump administration, and, as CBS All Access put it, "Diane [trying] to figure out whether you can resist a crazy administration without going crazy yourself."

"This season is about finding out what that storm is," said Robert King ahead of the premiere, referring to a cryptic 2017 quote by President Donald Trump. "It’s about what happens when the guardrails are coming off of our institutions."

The creators also said they had backup plans should real-world events — including the now-unlikely event of a presidential impeachment — unfolded before the show finished its run.

The Kings co-created The Good Fight with Phil Alden Robinson. All three executive produce along with Ridley Scott, David W. Zucker, Liz Glotzer, Brooke Kennedy and William Finkelstein.

The series is part of a CBS All Access lineup that also includes Star Trek: Discovery and spinoff Short Treks, The Twilight Zone, Strange Angel, Tell Me a Story and the comedy No Activity. More Star Trek properties, including a series starring Patrick Stewart as Jean-Luc Picard, along with the true-crime drama Interrogation, Marc Cherry's dark comedy Why Women Kill and Stephen King adaptation The Stand, are on deck.