The rivalry between American astronauts and Soviet cosmonauts intensifies as last-minute changes impact the Pathfinder mission plan.

Tensions between the U.S. and the Soviet Union reach an all-time high on the moon, throwing multiple missions into jeopardy. Season finale.

Ellen is challenged by her new role. Margo’s allegiances are put to the test. Karen explores new opportunities—personally and professionally.

Gordo returns to space. Molly faces an upsetting new reality. Aleida confronts her first major hurdle at work.

American astronauts and NASA leadership prepare for a new mission with unlikely partners. Ellen gets in touch with an old friend.

Ed’s reckless behavior at NASA shakes the foundation of the Baldwin family. Tracy attempts to readapt to life in space.

Nearly a decade later, technology and lunar exploration have taken huge strides—but a solar storm threatens the astronauts on Jamestown.

NASA preps a Jamestown relief mission, while Karen waits for news at the hospital.

A crisis in space puts the Apollo 24 and 25 crews in peril.

Ed handles a trespasser. Ellen and Deke chart a new course without Mission Control. Season finale.

Ed and the crew change Apollo 15’s landing site after lunar ice is detected.

A launchpad accident leads to delayed missions and FBI background checks.

A training accident spurs a national debate about women astronauts.

NASA is in crisis as the Soviets land the first man on the moon in 1969, the beginning of an alternate history.

Director von Braun opposes President Nixon’s directive, with dire consequences.