A fourth signal leads the U.S.S. Discovery to an insular world, where Pike is forced to make a life-changing choice. Burnham and Spock investigate a Section 31 ship gone rogue, leading to a discovery with catastrophic consequences.

Ali Momen, Byron Abalos, David Benjamin Tomlinson, Emily Coutts, Ian James Corlett, Julianne Grossman, Kenneth Mitchell, Mary Chieffo, Mia Kirshner, Olivia Croft, Oyin Oladejo, Patrick Kwok-Choon, Rachael Ancheril, Ronnie Rowe Jr., Sara Mitich, Tig Notaro