Leroy Chiao
as Himself (NASA Astronaut)
Kenneth Cockrell
as Himself (NASA Astronaut)
Robert Curbeam Jr.
as Himself (Commander, USN)
Brian Duffy
as Himself (Colonel, USAF, Ret.)
Michael Gernhardt
as Himself (NASA Astronaut)
Yuri Gidzenko
as Himself (Lieutenant Colonel, Air Force Russia)
Umberto Guidoni
as Himself (European Space Agency)
Chris Hadifield
as Himself (Colonel, CAF)
Susan Helms
as Herself (Colonel, USAF)
Charles Hobaugh
as Himself (Major, USMC)
Marsha Ivins
as Herself (NASA Astronaut)
Thomas Jones
as Himself (NASA Astronaut)
Janet Kavandi
as Herself (NASA Astronaut)
James Kelly
as Himself (Lt. Colonel, USAF)
Sergei Krikalev
as Himself (Russian Cosmonaut)
Steven Lindsey
as Himself (Lt. Colonel, USAF)
Yuri Lonchakov
as Himself (Lieutenant Colonel, Russian Air Force)
Pamela Melroy
as Herself (Lieutenant Colonel, USAF)
Mark Polansky
as Himself (NASA Astronaut)