Kayshon, His Eyes Open

After a prominent member of the Collector's guild dies, the Cerritos is tasked with preparing his collection to be catalogued under the supervision of Collector Siggi. The Cerritos new chief of security, Kayshon, joins the away team with Mariner, Tendi, Rutherford, and Jet Manhaver—an ensign who takes over Boimler's position and makes Mariner feel threatened. On the Titan, Boimler helps an away team survive a dangerous mission but is accidentally duplicated while he is being transported back to the ship. Unknown to Starfleet, Collector Siggi steals a rare mask from the collection which triggers the dead collector's automated defense mechanisms. These attack the away team and Kayshon is turned into a rag doll in the chaos. Freeman does not check in with the team following a leadership review that criticized her for micro-managing.

Summary from Wikipedia, CC BY-SA 4.0.