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

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

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. ...

With a little help from Molly, Ed plans a career change - as his old Jamestown crewmates Gordo and Danielle struggle. ...

A dispute on the moon prompts NASA officials to consider arming astronauts. Ed's past comes back to haunt him. ...