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