Those looking forward to Star Trek Discovery’s promised streaming debut in May will have to wait even longer. According to the The Hollywood Reporter, the premiere has been pushed back right as production is due to start and CBS finishes casting and script rewrites.

"This is an ambitious project; we will be flexible on a launch date if it's best for the show,” a CBS rep said in a statement. “We've said from the beginning it's more important to do this right than to do it fast. There is also added flexibility presenting on CBS All Access, which isn't beholden to seasonal premieres or launch windows."

The 13-episode Discovery was originally slated to premiere this month on CBS, but was pushed back to allow the producers to better “achieve a vision” fans of the franchise would appreciate. Since then, however, the series has been dogged by a slow casting process, as well as the departure of former showrunner Bryan Fuller.

Nevertheless, the series is still forging ahead. CBS Television today announced that Gotham and True Blood star James Frain has joined the cast as Sarek, the father of Spock. He’ll work alongside The Walking Dead’s Sonequa Martin-Green, who was recently cast as the series lead, as well as Crouching Tiger, Hidden Dragon star Michelle Yeoh, who will play a Starfleet captain.

All told, there’s a great deal to be excited about with this series. It’s just completely uncertain when it will actually hit our screens.