The Planets

Glavne uloge:

Mark Halliley  >  Himself - Narrator (voice)
Donald Black  >  Himself (as Dr. Donald Black)
Jerry Soften  >  Himself
Sasa Vasilievski  >  Himself
Imre Friedmann  >  Himself - Florida State University
Bruce Murray  >  Himself - Director, Jet Propulsion Laboratory, 1976-1982 (as Professor Bruce Murray)
Carl Sagan  >  Himself - Astronomer (archive footage)
Boris Chertok  >  Himself - Rocket Designer
Carolyn Porco  >  Herself - Lunar and Planetary Laboratory, Arizona (as Professor Carolyn Porco)
Douglas Gough  >  Himself - Institute of Astronomy, Cambridge University (as Professor Douglas Gough)
Nikita Khrushchev  >  Himself (archive footage)
Gerry Soffen  >  Himself - Viking Mission Scientist
David Levy  >  Himself - Astronomer (as Dr. David Levy)
Don Gurnett  >  Himself - University of Iowa (as Dr. Don Gurnett)
Truls Hansen  >  Himself - Auroral Observatory, University of Tromso (as Professor Truls Hansen)