Along with a sizzle reel for the new season, which you can watch above, “Star Trek” showrunner Alex Kurtzman announced that “The Umbrella Academy” star Callum Keith Rennie is joining the cast along with Eve Harlow (“Agents of SHIELD”) and Elias Toufexis (“Shadowhunters”).Rennie will play Capt. Reyner, a Starfleet officer used to commanding his ship in times of war, but finds it much harder to be a leader during times of peace.