Michael Burnham senses Sarek’s distress through a "soul graft"—a piece of his katra (spiritual essence) shared with her years earlier to save her life after a terrorist bombing.
Using a neural enhancer to boost her mental link, Burnham travels into Sarek's mind to find his location. She confronts a recurring memory of her own graduation, eventually forcing Sarek to reveal a shameful secret: he was forced to choose between Burnham and Spock for the Vulcan Expeditionary Group and chose Spock. Star Trek Discovery S01e06 Ita Eng 720p byMetalh
Formally joins the crew as the new Chief of Security . Hints are dropped about his mysterious past and combat style, which Lorca notes is similar to a Klingon's. Michael Burnham senses Sarek’s distress through a "soul
Shows a significant personality shift—becoming more lighthearted and "groovy"—following his self-experimentation with the mycelial spore drive. Lore Connections Formally joins the crew as the new Chief of Security