Jeff Wilburn as Self - Narrator (voice)

Charles Walker as Self - Payload Specialist, 1984-1985

Stephanie Stilson as Self - Discovery Flow Director, NASA

Valerie Neal as Self - Curator, National Air and Space Museum

Kenneth S. Reightler Jr. as Self - Astronaut, 1988-1994

Frank Culbertson as Self - Astronaut, 1985-2001

William F. Readdy as Self - Astronaut, 1987-1996

Malcolm Collum as Self - Chief Conservator, National Air and Space Museum

Kathryn Thornton as Self - Astronaut, 1985-1995

Pamela Ann Melroy as Self - Astronaut, 1995-2007

Mike Parrish as Self - Kennedy Space Center

Cliff Semonski as Self - Kennedy Space Center

Tim Keyser as Self - Kennedy Space Center

Tony Sabatino as Self - Kennedy Space Center

Ray Zink as Self - Kennedy Space Center

Carl E. Walz as Self - Astronaut, 1990-2002

Kathryn D. Sullivan as Self - Astronaut, 1979-1992

Rich Kowalczyk as Self - Chief Preservation and Restoration Unit

Frederick Gregory as Self - Astronaut, 1978-1991

John Glenn as Self - Astronaut, 1959-1962 & 1998

Eileen Collins as Self - Astronaut, 1991-2005

Charles F. Bolden Jr. as Self - NASA Administrator