Werner Herzog as Narrator (voice)

Clive Oppenheimer as Self - Volcanologist

Scott Rowland as Self - Transportation Dept

Stefan Pashov as Self - Philosopher, Forklift Driver

Doug MacAyeal as Self - Glaciologist

Ryan Andrew Evans as Self - Filmmaker, Cook

Kevin Emery as Self - Survival School Instructor

Olav T. Oftedal as Self - Nutritional Ecologist

Regina Eisert as Self - Physiologist

David R. Pacheco Jr. as Self - Journeyman Plumber

Samuel S. Bowser as Self - Cell Biologist

Jan Pawlowski as Self - Zoologist

William Jirsa as Self - Linguist, Computer Expert

Karen Joyce as Self - Traveler, Computer Expert

Libor Zicha as Self - Utility Mechanic

Ashrita Furman as Self - Multiple World Record Holder

David Ainley as Self - Marine Ecologist

William McIntosh as Self - Volcanologist, Geochronologist

Peter Gorham as Self - Physicist

Ernest Shackleton as Self - (archive footage)

Shaun Phillip Cantwell as Self - General Assistant