It's Steve and Dani's wedding day and things are going well. Then Kristen upstages everything by publicly proposing to Tom. Unfortunately, Tom has trouble with commitment ...

The team are dispatched to a foggy ravine where a couple, Michael and Katie Pitt, have gone over. Katie dies and initially Lara feels for Michael but begins to suspect so ...

The team are dispatched to a foggy ravine where a couple, Michael and Katie Pitt, have gone over. Katie dies and initially Lara feels for Michael but begins to suspect so ...

The team are dispatched to a foggy ravine where a couple, Michael and Katie Pitt, have gone over. Katie dies and initially Lara feels for Michael but begins to suspect so ...

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. ...

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

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

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. ...

Margo must lead a seemingly impossible mission. Danielle wants to return to the moon. Gordo grapples with life on Earth. ...

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

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

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

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

Ed, Gordo, and Danielle struggle with an extended Jamestown mission. ...

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

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

A training accident spurs a national debate about women astronauts. ...

Deke must recruit female astronauts after Russian lands a woman on the moon. ...