鲁特格尔·哈尔

Rutger Hauer

饰：自己 Self

Dave Canterbury

饰：Himself

Cody Lundin

饰：Himself

Roman Dial

饰：Himself - Environmental Scientist

Tao Berman

饰：Himself - Extreme Kayaker

Sonny Bass

饰：Himself - Wildlife Biologist

Lou Summerfield

饰：Himself - Facility Manager: Glacier NP

Herb Ferguson

饰：Himself - Equipment Operator: Glacier NP

Blase Reardon

饰：Himself - Avalanche Specialist: USGS

Chris Lundy

饰：Himself - Avalanche Specialist: Glacier NP

Kevin Norton

饰：Himself - Guest: Knight Inlet Lodge

Monte Meier

饰：Himself - World Class Racer

Wendy Warborg

饰：Herself - Heli-Skier

Hank Heasler

饰：Himself - Geologist: Yellowstone NP

Will Gaff

饰：Himself - Climber

Jim Mead

饰：Himself - Geologist: Northern Arizona University

Julie Munger

饰：Herself - Grand Canyon River Boarder

马克·布朗罗

Mark Brownlow

饰：Himself - Producer

Nick Guy

饰：Himself - Cameraman

Peter Knamiller

饰：Himself - Field Assistant

Nappy Neaman

饰：Himself - Goat Expert

John Shier

饰：Himself - Cameraman

Joe St. Onge

饰：Himself - Mountain Guide

汤姆·塞立克

Thomas William Selleck

饰：Narrator

史蒂夫·贝克肖

Steve Backshall

饰：Self

Justine Evans

Justine Evans

饰：Self

Huw Cordey

Huw Cordey

饰：Self - Series Producer

贾斯汀·安德森

Justin Anderson

饰：Self - Producer

Richard Wollocombe

Richard Wollocombe

饰：Self - Underwater Cameraman