Directing
NOVA
1974 · Writer
The Science of Interstellar
2014 · Producer
Galapagos
2006 · Writer
30 Years of National Geographic Specials
1995 · Writer
The Noble Horse
1999 · Writer
Volcano: Nature's Inferno
1997 · Producer
Ultimate Mars Challenge
2012 · Writer
Secrets of Stonehenge
2010 · Director
Lost Ships of the Mediterranean
Out Loud
2020 · Director
Unfurled
2025 · Director
Black Sky
2004 · Director
