Como ator
🎬
The Scientist's Warning 2022· Self
🎬
Jumbo: The Life of an Elephant Superstar 2018
🎬
So Right So Smart 2009· Self🎬
A Silent Forest: The Growing Threat, Genetically Engineered Trees 2009· Himself
🎬
Club social 2008· Self
🎬
Cuba: The Accidental Revolution 2006· Narrator
🎬
The Web of Life 2004
🎬
Weight of the World 2003· Narrator (voice)🎬
Nuclear Dynamite 2000
🎬
Cyberspace 1995· Himself - Host
🎬
Redwood Summer 1990· Self
🎬
Fragile Harvest 1986· Self - Narrator (voice)
🎬
The Great Debate 1974· Self
Como equipe