The Planets Terra Firma (Season 1, Episode 2)
TV-G
TV Episode | 50 min | Documentary

The Planets

Terra Firma (Season 1, Episode 2)

TV-G

TV Episode | 50 min | Documentary

The Planets looks at unmanned exploration of our solar system focusing on the discoveries of the Mariner, Venera, Viking, and Voyager probes.

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Cast	+ Add Cast
18 cast members

Name	Known for
Sasha Basilevsky Self - Geologist Self - Geologist See fewer	The Planets (1999)
Donald Black Self (as Dr. Donald Black) Self (as Dr. Donald Black) See fewer	The Planets (1999)
Mark Halliley Self - Narrator (voice) Self - Narrator (voice) See fewer	Equinox (1986)
William Hartmann Self - Planetary Sciences Institute, Arizona (as Bill Hartmann) Self - Planetary Sciences Institute, Arizona (as Bill Hartmann) See fewer	Future Flight (1987)
Jim Head Self - Brown University, Rhode Island Self - Brown University, Rhode Island See fewer	Summoning Sylvia (2023)
Linda Hyder Self - Voyager Navigation Engineer Self - Voyager Navigation Engineer See fewer	The Planets (1999)
Mike Malin Self - Malin Space Science Systems, California Self - Malin Space Science Systems, California See fewer	The Planets (1999)
Mikhail Marov Self - Venera Mission Engineer Self - Venera Mission Engineer See fewer	The Planets (1999)
Ray Reynolds Self - Physicist Self - Physicist See fewer	The Planets (1999)
Arnold Selivanov Self - Venera Mission Engineer Self - Venera Mission Engineer See fewer	The Planets (1999)
Brad Smith Self - Astronomer Self - Astronomer See fewer	The Infinite Voyage (1987)
Larry Soderblom Self - US Geological Survey, Arizona Self - US Geological Survey, Arizona See fewer	The Infinite Voyage (1987)
Gerry Soffen Self - Viking Mission Scientist Self - Viking Mission Scientist See fewer	The Planets (1999)
Jerry Soften Self Self See fewer	The Planets (1999)
Ellen Stofan Self - NASA Jet Propulsion Laboratory Self - NASA Jet Propulsion Laboratory See fewer	Mars (2016)
Karen Stone Narrator (for US version) Narrator (for US version) See fewer	The Planets (1999)
Jurrie Van Der Woude Self - NASA Jet Propulsion Laboratory Self - NASA Jet Propulsion Laboratory See fewer	The Planets (1999)
Sasa Vasilievski Self Self See fewer	The Planets (1999)