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Cast

Episode cast overview:
...
Himself - Narrator (voice)
Dave Grinspoon ...
Himself - Curator of Astrobiology (as Dr. David H. Grinspoon)
Fran Bagenal ...
Herself - Professor (as Dr. Fran Bagenal)
Ronald Greeley ...
Himself - Regents' Professor of Geology (as Dr. Ronald Greeley)
Rosaly Lopes ...
Herself - Planetary Geologist (as Dr. Rosaly M. C. Lopes)
Kevin R. Grazier ...
Himself - Investigation Scientist (as Dr. Kevin R. Grazier)
Heidi Hammel ...
Herself - Senior Research Scientist (as Dr. Heidi B. Hammel)
John Spencer ...
Himself - Staff Scientist (as Dr. John R. Spencer)
Geoff Marcy ...
Himself - Professor of Astronomy (as Dr. Geoffrey W. Marcy)
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Storyline

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Certificate:

TV-G
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Details

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Release Date:

6 December 2006 (USA)  »

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