Sam Shepard plays Chuck Yeager, a fearless test pilot who becomes the first person to break the sound barrier.
Scott Glenn portrays Alan Shepard, one of the original seven Mercury astronauts and the first American to travel into space.
Ed Harris takes on the role of John Glenn, the iconic astronaut who becomes the first American to orbit the Earth.
Dennis Quaid plays Gordon Cooper, one of the seven original astronauts selected for the Mercury program.
Fred Ward portrays Gus Grissom, one of the Mercury Seven astronauts and the second American to fly in space.
Barbara Hershey plays Glennis Yeager, Chuck Yeager's devoted wife and a supportive presence throughout his career.
Kim Stanley portrays Pancho Barnes, a colorful and influential figure in the world of aviation.
Veronica Cartwright plays Betty Grissom, the wife of astronaut Gus Grissom.
Pamela Reed takes on the role of Trudy Cooper, the strong-willed wife of astronaut Gordon Cooper.
Scott Paulin portrays Deke Slayton, one of the original Mercury Seven astronauts and NASA's first Chief of the Astronaut Office.
Charles Frank plays Scott Carpenter, one of the original Mercury Seven astronauts and the fourth American in space.
Lance Henriksen portrays Wally Schirra, one of the original Mercury Seven astronauts and the only astronaut to fly in all of the Gemini, Mercury, and Apollo programs.
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