Burnham and the Discovery crew travel to Book's home planet to help rescue it from Osyraa, the formidable leader of the Emerald Chain. Stamets and Adira continue their search for valuable information about the origin of the Burn.

Ache Hernandez, Avaah Blackwell, Emily Coutts, Ian Lake, Janet Kidder, Noah Averbach-Katz, Oded Fehr, Oyin Oladejo, Patrick Kwok-Choon, Ronnie Rowe Jr., Sara Mitich