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The starship Discovery has found its captain: Jason Isaacs (the Harry Potter franchise, The OA) has landed a major role in the series, playing Captain Lorca.

As previously announced, Star Trek: Discovery will star Sonequa Martin-Green (The Walking Dead) as a lieutenant, marking the first time a Star Trek series has launched by focusing on a character other than a ship’s highest-ranking officer. We also have known for months that Michelle Yeoh will play Captain Georgiou, a Starfleet captain aboard another starship that’s key to the story, the Shenzhou. But those previous castings have raised the question: If Martin-Green is only a lieutenant and Yeoh leads the Shenzhou, then who is running the show’s titular starship? Well, now we know.

Unfortunately, that’s all we know about his character. And though we know he plays a major role, CBS All-Access is staying tight-lipped about whether characters are regulars, recurring or guest stars (which is just as well, perhaps, as such designations can spoil how long somebody survives in a show like this). At least we know Isaacs won’t be wearing a red shirt.

Also joining the Trek-verse: Mary Wiseman (Longmire) as “Tilly,” a Starfleet Academy Cadet in her final year of study, who is assigned to the Starship Discovery.

Previously announced cast members include: James Frain (Gotham) as Spock’s father, Sarek; Doug Jones (Hellboy) will play Lt. Saru, a Starfleet Science Officer and a new alien species in the Star Trek universe; and Anthony Rapp (Rent) was cast as Lt. Stamets, an “astromycologist,” fungus expert, and Starfleet Science Officer aboard the Starship Discovery.

Star Trek: Discovery is currently in production, but it’s not yet clear when the show will premiere. Originally a February date was announced, and then May. Now it’s looking like fall is pretty likely (but we make no promises!).

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