Azure Parsons
as Annie Glenn
Bret Harrison
as Gordon "Gordo" Cooper
Desmond Harrington
as Alan Shepherd
Erin Cummings
as Marge Slayton
JoAnna Garcia Swisher
as Betty Grissom
Joel Johnstone
as Gus Grissom
Odette Annable
as Trudy Cooper
Yvonne Strahovski
as Rene Carpenter
Zoe Boyle
as Jo Schirra
Aaron McCusker
as Wally Schirra
Dominique McElligott
as Louise Shepard
Kenneth Mitchell
as Deke Slayton
Wilson Bethel
as Scott Carpenter
Sam Reid
as John Glenn