 Werner HerzogNarrator (voice) | Narrator (voice) |
 Clive OppenheimerSelf - Volcanologist | Self - Volcanologist |
| SScott RowlandSelf - Transportation Dept | Self - Transportation Dept |
| SStefan PashovSelf - Philosopher, Forklift Driver | Self - Philosopher, Forklift Driver |
| DDoug MacAyealSelf - Glaciologist | Self - Glaciologist |
| RRyan Andrew EvansSelf - Filmmaker, Cook | Self - Filmmaker, Cook |
| KKevin EmerySelf - Survival School Instructor | Self - Survival School Instructor |
| OOlav T. OftedalSelf - Nutritional Ecologist | Self - Nutritional Ecologist |
| RRegina EisertSelf - Physiologist | Self - Physiologist |
| DDavid R. Pacheco Jr.Self - Journeyman Plumber | Self - Journeyman Plumber |
| SSamuel S. BowserSelf - Cell Biologist | Self - Cell Biologist |
| JJan PawlowskiSelf - Zoologist | Self - Zoologist |
| WWilliam JirsaSelf - Linguist, Computer Expert | Self - Linguist, Computer Expert |
| KKaren JoyceSelf - Traveler, Computer Expert | Self - Traveler, Computer Expert |
| LLibor ZichaSelf - Utility Mechanic | Self - Utility Mechanic |
| AAshrita FurmanSelf - Multiple World Record Holder | Self - Multiple World Record Holder |
| DDavid AinleySelf - Marine Ecologist | Self - Marine Ecologist |
| WWilliam McIntoshSelf - Volcanologist, Geochronologist | Self - Volcanologist, Geochronologist |
| PPeter GorhamSelf - Physicist | Self - Physicist |
 Ernest ShackletonSelf - (archive footage) | Self - (archive footage) |
| SShaun Phillip CantwellSelf - General Assistant | Self - General Assistant |
