Background
During production on the first season of Star Trek: Discovery, special guest star Michelle Yeoh suggested to executive producer Alex Kurtzman that they make a spin-off series featuring her character Philippa Georgiou. Yeoh made the suggestion because she loved playing the character, and because she wanted to be a role model for young Asian women. Kurtzman was enthusiastic about the idea, but was unsure if a spin-off would be feasible since Discovery had not yet been released. After Yeoh's performance received positive responses, the writers of Discovery began exploring the black ops division Section 31 as part of her storyline in the second season. That led to further discussions about a potential spin-off series. In June 2018, after becoming sole showrunner of Discovery, Kurtzman signed a five-year overall deal with CBS Television Studios to expand the Star Trek franchise beyond Discovery to several new series, miniseries, and animated series. Yeoh was in talks to star in a spin-off series by November, which was expected to follow her character's Section 31 storyline.
The streaming service CBS All Access confirmed it was moving ahead with development on the spin-off in January 2019, with Discovery writers Bo Yeon Kim and Erika Lippoldt set as writers and showrunners. Kurtzman said the project was intended to be an ongoing series rather than a limited miniseries, and added that Kim and Lippoldt had begun writing while still working on the second season of Discovery. It was his hope that the new series would be ready to begin production once the third season of Discovery was completed. In March 2019, CBS Television Studios president David Stapf said the spin-off would be produced in Toronto, Canada, like Discovery, but it was "a good couple of years away", with Kurtzman expecting it to be released in 2021 or 2022. Yeoh confirmed that she was working on the series the next month. Kurtzman said Discovery's writers were aware that their portrayal of Section 31 was inconsistent with the organization's introduction in the series Star Trek: Deep Space Nine and the spin-off would show its evolution from their version to its original depiction, specifically why it becomes an "underground organization". Kurtzman cited Killing Eve and the Mission: Impossible franchise as influences and said Georgiou would be "a protagonist who's entirely unreliable. At the end of the day, she's going to do the right thing, but in the exact wrong way." In July, Shazad Latif indicated that he could be reprising his Discovery role of Ash Tyler in the spin-off. A writers' room had been established by the end of November, and Kurtzman said the completed pilot script "occupies an area of the Trek universe that's never really been explored geographically. It has a new mythology to it". He also compared the series to the film Unforgiven (1992).
By the end of January 2020, the series was set to be filmed from May to November 2020, in the newly opened CBS Stages Canada in Mississauga, near Toronto. In February 2020, the series was reportedly renewed for a second season to allow the first two seasons to be filmed back-to-back. Production on the third season of Discovery was completed that month, but filming on the spin-off was delayed by Yeoh's commitment to the film Shang-Chi and the Legend of the Ten Rings (2021) which was set to be filmed from January to May. Plans to instead begin filming the spin-off series in May were soon delayed by the COVID-19 pandemic, with Kurtzman later stating that their plans for the series had been "thrown completely into whack" by the pandemic. By August 2020, Kim and Lippoldt were working with Discovery writer Craig Sweeny to build the series; Sweeny previously served as showrunner on the Kurtzman-produced series Limitless. Kurtzman said the writers had been able to "get quite ahead in scripts" due to the production delays. A month later, frequent Star Trek director Jonathan Frakes said Kim and Lippoldt were optimistic that the series would be made despite work starting on a different Discovery spin-off series, Star Trek: Strange New Worlds. Frakes had asked to direct Section 31's pilot episode but said a female director would likely be hired since the series was primarily a "woman's story". In March 2021, ViacomCBS announced that CBS All Access would be expanded and rebranded as Paramount+.
The third season of Discovery writes out Georgiou in the two-part episode "Terra Firma", released in December 2020, which was co-written by Kim and Lipoldt. They said the character's storyline for the season was developed with "a lot of care", and it ends with her being transported to an unknown place and time where the spin-off is set. Yeoh said she hoped work on the spin-off could continue "very soon". In February 2021, Kurtzman said there was still conversations taking place about making the series, and he was optimistic about it eventually happening due to the already completed scripts. However, he said the spin-off was unlikely to be added to Paramount+'s slate of Star Trek Universe series until one of the existing five series came to an end. In February 2022, Kurtzman said the Section 31 spin-off was still in development and his team were planning Star Trek series that would be released two or three years later. The series was expected to get a pickup from Paramount+ soon after. In May, Kurtzman said he and his team were focusing on developing Section 31 and Star Trek: Starfleet Academy as the next two Star Trek series. No further announcements had been made by January 2023, when Paramount Streaming's chief programming officer Tanya Giles said the spin-off was still in development.