Seeking answers, the U.S.S. Discovery ventures into a subspace rift created by the Dark Matter Anomaly. Meanwhile, Book faces a strange visitor from his past.

Annabelle Wallis, Emily Coutts, Ian Alexander, Ivan Lopez, Oyin Oladejo, Patrick Kwok-Choon, Raven Dauda, Ronnie Rowe Jr., Rothaford Gray, Sara Mitich