"Star Trek: Discovery" has expanded its cast, and reassigned one of its ranks, as the CBS revival inches closer to a premiere.

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The network announced that Penny Dreadful” alum Shazad Latif, previously cas as Klingon commanding officer Kol, will join the Federation as Lt. Tyler. His old Klingon uniform will now be filled by "Jericho's" Kenneth Mitchell.

Mitchell is joined by Claire McConnell ( "This Is What It Sounds Like Falling Out of Love with You") as Dennas and Damon Runyan ("Suits") as Ujilli, both described as leaders in the Klingon Empire.

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In addition, the U.S.S. Discovery has also been assigned a new security officer, Commander Landry, played by former "Battlestar Galactica" alum Rekha Sharma.

Set a decade before the events of the original series, "Star Trek: Discovery" stars Sonequa Martin-Green as First Officer Michael Burnham, Jason Isaacs as Captain Lorca, Michelle Yeoh as Captain Georgiou, Doug Jones as Science Officer Lt. Saru and Anthony Rapp as astromycologist Lt. Stamets, with Rainn Wilson appearing as Harry Mudd.

The 13-episode first season his expected to premiere in late summer or early fall on CBS before moving to the network's streaming platform CBS All Access. "Star Trek: Discovery" will be available on Space in Canada and on Netflix in the rest of the world.