Actress Sonequa Martin-Green, who plays a key role in the series, revealed the first trailer for the fourth season of Star Trek: Discovery, during First Contact Day 2021, a virtual event hosted by Paramount+ featuring panels, livestreams, and news of various forthcoming Star Trek properties.
(Spoilers for prior seasons below.)
Martin-Green plays Michael Burnham, an orphaned human raised on the planet Vulcan by none other than Sarek (James Frain) and his human wife, Amanda Grayson (Mia Kirshner)—aka, Spock’s (Ethan Peck) parents. So she is Spock’s adoptive sister. As I’ve written previously, the S2 season-long arc involved the mysterious appearances of a “Red Angel” and a rogue Starfleet AI called Control that sought to wipe out all sentient life in the universe.