ATTORI
Jonathan Keeble
Self - Narrator (UK)- Tony Prave
Self - Geologist, University of St. Andrews - Mike Poland
Self - Geologist, U.S. Geological Survey - Nick Petford
Self - Bournemouth University - Charles Merguerian
Self - Geologist, Hofstra University - Karl E. Karlstrom
Self - Geologist, University of New Mexico - Bob Anderson
Photographer, University of Colorado at Boulder - Bill McGuire
Self - Geologist, University College London - Andreas Bauder
Self - Glaciologist - Toni Bürgin
Self - Paleontologist - John Douglass
Self - Geologist, Paradise Valley Community Colleg - William Hartmann
Self - Planetary Science Center - Hank Heasler
Geologist, Yellowstone National Park - John Houston
Self - Consultant Hydro-Geologist - Shelton Johnson
Self - Park Ranger, Yosemite National Park Service - David Kring
Self - Geologist, NASA - Andrew Lambert
Self - British Naval Historian, Kings College, Lon - Alan Lester
Self - University of Colorado at Boulder - Charles Mandeville
Self - American Museum of Natural History - Timothy McCue
Self - Engineer, Goderich Salt Mine - Walter Mooney
Self - U.S. Geological Survey - Charlie Paull
Self - Marine Geologist, Monterey Bay Aquarium Res - Jen Smith
Self - Geologist, Washington Univ. in St. Louis - Katharine Bull
Self - Alaska Volcano Observatory - Tom Casadevall
Self - Geologist, U.S. Geological Survey - Kenton Cool
Geologist - Richard Goldfarb
Self - Geologist, U.S. Geological Survey - James Howard
Self - Geologist, CASP Research - Peter K. Swart
Self - Marine Geologist, University of Miam - Brian Atwater
Self - U.S. Geological Survey
Civil War 
Il lato positivo 
Floopaloo 
Indagini ad alta quota 
