With production scheduled to begin next month on CBS All Access' long-awaited Star Trek Discovery, Bryan Fuller has stepped down as showrunner of the upcoming series. Bryan Fuller will still serve as an executive producer on the series, but the day-to-day responsibilities for the show will be handed over to Gretchen Berg and Aaron Harberts as the new showrunner. Bryan Fuller has written the first two scripts for Star Trek Discovery and mapped out a larger mythology for the show as well.

Variety reports that Bryan Fuller's duties on two other upcoming shows, Starz's American Gods and NBC's Amazing Stories, is the reason for him stepping down. Sources claim that there had been "some strain" between Bryan Fuller and CBS over the progress of the series. It reportedly became clear that Bryan Fuller would not be able to devote enough time to Star Trek Discovery as production begins next month in Toronto. American Gods is reportedly in its final weeks of shooting and post-production.

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When Star Trek Discovery was first announced last November, it was revealed that the series premiere would air on CBS in January 2017, before the show moved to its full-time home, the new streaming service CBS All Access. Back in September, the show was pushed to a May 2017 debut, to give the producers extra time to "achieve a vision we can all be proud of." No cast members have been announced at this time, but with production starting next month, that may change soon.

Last month, Bryan Fuller revealed in a radio interview that the lead character is a female known only as Number One, but we haven't heard details about any other character at this time. The new Star Trek series will introduce never-before-seen characters seeking imaginative new worlds and new civilizations, while exploring the dramatic contemporary themes that have been a signature of the franchise since its inception in 1966. Bryan Fuller also reveled that the primary ship in the show is named Discovery because that word meant the promise of a greater future when Gene Roddenberry created the original Star Trek series.

Bryan Fuller also recently shot down rumors that this show is an anthology series, but it remains to be seen when we'll get a full plot synopsis. Gretchen Berg & Aaron Harberts have previously worked with Bryan Fuller on his hit shows Wonderfalls and Pushing Daisies, and their other writing credits include episodes on shows such as Mercy, Off the Map, GCB, Revenge and most recently Reign. While we wait for more on Star Trek Discovery, take a look at Bryan Fuller's tweet, where he sends his best to new showrunners Gretchen Berg & Aaron Harberts.