A second signal leads Discovery to Terralysium, a planet of humans whose ancestors were brought there from Earth during World War III.
Pike reveals that Spock voluntarily checked himself into a psychiatric unit and asked that his family not be told. A new signal draws Discovery across the galaxy to Terralysium, where descendants of people who fled Earth during World War III live in a faith community that blends several religions. Pike, Burnham and Owosekun visit while trying not to reveal the truth about the outside world.
Tilly, struck by a fragment of the dark-matter asteroid, is visited by a figure she knew as May Ahearn. With her help the crew stops a deadly radiation shower threatening the planet. Footage from an old helmet camera shows that the Red Angel moved the original settlers to the planet. Jonathan Frakes directed.