Stars (in credits order)
Tom Selleck
Narrator
Rutger Hauer
Steve Backshall
Self
Dave Canterbury
Justine Evans
Cody Lundin
Chris Morgan
Self - Bear Guide
Roman Dial
Self - Environmental Scientist
Tao Berman
Self - Extreme Kayaker
Sonny Bass
Self - Wildlife Biologist
Lou Summerfield
Self - Facility Manager: Glacier NP
Herb Ferguson
Self - Equipment Operator: Glacier NP
Blase Reardon
Self - Avalanche Specialist: USGS
Chris Lundy
Self - Avalanche Specialist: Glacier NP
Kevin Norton
Self - Guest: Knight Inlet Lodge
John Reid
Self - Owner: Knight Inlet Lodge
Monte Meier
Self - World Class Racer
Wendy Warborg
Self - Heli-Skier
Hank Heasler
Self - Geologist: Yellowstone NP
Carl Carlson
Self - Geologist
Will Gaff
Self - Climber
Jim Mead
Self - Geologist: Northern Arizona University
Julie Munger
Self - Grand Canyon River Boarder
Justin Anderson
Self - Producer
Adam Chapman
Paul Stewart
Self - Cameraman
Gavin Thurston
Huw Cordey
Self - Series Producer
Mark Brownlow
John Shier
Alicia Decina
Self - Assistant Producer
Stuart Robinson
Self - Hurricane Expert
Peter Knamiller
Self - Field Assistant
Mark Emery
Nick Guy
Nappy Neaman
Self - Goat Expert
Joe St. Onge
Self - Mountain Guide
Richard Wollocombe
Self - Underwater Cameraman