NOVA

1974 · Director, Writer

Galapagos

2006 · Writer

The Science of Interstellar

2014 · Director, Writer

Rx for Survival: A Global Health Challenge

2005 · Director

Black Sky

2004 · Director

30 Years of National Geographic Specials

1995 · Writer

Secrets of Stonehenge

2010 · Director, Writer

Ultimate Mars Challenge

2012 · Director, Writer

Unfurled

2025 · Director

Lost Ships of the Mediterranean

1999 · Director, Writer

Out Loud

2020 · Director

The Noble Horse

1999 · Director, Writer