Reparto (por orden de créditos)
Rob Nelson
Self - Host
Stefan Burns
Self - Geophysicist
Tim Bechtel
Jared Peacock
Self - Geophysicist, USGS
Adam Cho
Roboticist
Doug Platt
Self - Capitol Spokesman
Tracy Beach
Self - Colorado Historian
Valerie Van Heest
Self - Historian
Tim Kilgannon
Self - Owner: Blake Street Vault
Griffin Alberti
Self - Tech Advisor
Marsha Stevers
Self - Lodge Employee
Aaron Swink
Self - Guide
Larry Johnson
Self - Seelbach Historian
Keith Muhlestein
Self - Geologist
Jennifer Burnham
Self - Soil Scientist
Kenneth Bader
Self - Paleontologist
Frank Watson
Self - Bill's Borther
Gretchen Schmauder
Rick Walker
Self - LIDAR Operator
Jeff Volkman
Self - Manager: Rio Grande
Aubri Jenson
Jim Meyer
Self - Seelbach Hotel
Brad Aagaard
Self - USGS
Neffra Matthews
William Watson
Jarrod Burks
Self - Archaelogist
Brent Breithaupt
Peter Gavette
Luther Strayer
Self - Lead Scientist
George 'Paki' Stephenson
Ron Oremland
Self - Geomicrobiologist
Mark W. Holley
Self - Underwater Archaelogist
Janet Monge
Self - Physical Antrhopologist
Ernie Lundelius
John A. Martini
Self - Alcatraz Historian
Mike Feves
Self - Geophysicist, Earth Dynamics
Hank Bailey
Self - Odawa Elder
Heath Montgomery
Self - Media Relations Director: DIA
John O'Shea
Deb Schweizer
Self - Park Ranger
Brian Price
Self - Conservationist
Bradley T. Lepper
Self - Archaeologist
Rufus Catchings
Nigel Crook
Tom Parsons
Tres Smith
Martin Lockley
Janet Watt
Bill Steffen
Self - Meteorologist
Ron Smith
Dale Rucker
John Vidale
Self - Seismologist