Characters played by Charlie Engelman
Self - Host
Characters played by Kirby Engelman
Self - Host
Self - Guest Appearance
Characters played by Casey Engelman
Self - Guest Appearance
Characters played by Patrick Rahill
Self - Guest Appearance
Characters played by Carly Ciarrocchi
Self - Host
Characters played by Bob Packo
Self - Guest Appearance
Characters played by Lucy Engelman
Self - Guest Appearance
Characters played by Cohen Gray
Self - Guest Appearance
Characters played by Aaron Abramowitz
Self - Guest Appearance
Characters played by Kara Lieff
Self - Guest Appearance
Characters played by Norris Gulish
Self - Guest Appearance
Characters played by Taylor Potts
Self - Guest Appearance
Characters played by Michio Kaku
Self - Guest Appearance
Characters played by Matthew Reed
Self - Guest Appearance
Characters played by Gabrianna Spitale
Self - Guest Appearance
Characters played by Karen Kosiba
Self - Atmospheric Scientist
Characters played by Joshua Wurman
Self - President
CSWR
Characters played by Geoffrey Notkin
Self - Meteorite Hunter
Characters played by Colin Brammer
Self - Entomologist
Characters played by Michael Reitz
Self - Engineer
Characters played by Clint Homestead
Self - Survivalist
Characters played by Jack Hubley
Self - Master Falconer
Characters played by Rob Giroux
Self - Falconer
Characters played by Lauren Morris
Self - Flavor Chemist
Characters played by Justin Savidis
Self - Iditarod Racer
Characters played by Mike Rochford
Self - Wildlife Biologist
Characters played by Paul Hoffman
Self - Application Scientist
Characters played by Cindy Otto
Self - Executive Director
PVWDC
Characters played by Wilson Puryear
Self - Animal Keeper
Characters played by Bill Reynolds
Self - Head of Arthropod Zoo
Characters played by Danielle Reed
Self - Associate Director
Monell Chemical Senses Center
Characters played by Lucien Junkin
Self - Senior Robotics Engineer
Characters played by Damon Collingsworth
Self - Co-Owner
California Carnivores
Characters played by Alan Friedlander
Self - Chief Scientist
Pristine Seas
National Geographic Society
Characters played by Dave Katz
Self - Tree Safety Guide
Characters played by Bill Demuth
Self - Footwear Examiner
Characters played by Brian Neilson
Self - Aquatic Biologist
Characters played by Mike Fossum
Self - Astronaut
Characters played by Michael Newman
Self - Volcano Expert
Characters played by Jake Kinney
Self - Action Sports Director
Characters played by Kris Sherry
Self - Rad Designer and Artist
Characters played by Steve Orfield
Self - Sound Expert
Characters played by Mike Grimm
Self - President and CEO
American Eagle Paper Mills
Characters played by Patrick Webster
Self - Monterey Bay Aquarium
Characters played by Jim Lonergan
Self - Trick Pilot & Expert Instructor
Characters played by Doug Foley
Self - Champion Pro Dragster
Characters played by Mike Cox
Self - Latent Fingerprint Examiner
Characters played by Rebecca Hooks
Self - Crime Scene Investigator
Characters played by David Sauro
Self - Caving Guide
Characters played by Ken Schwarz
Self - Blacksmith
Characters played by Amy Eveleth
Self - Animal Specialist
Characters played by Jana Kinsman
Self - Urban Beekeeper
Characters played by Susannah Carroll
Self - The Franklin Institute
Characters played by Brittany Wickham
Self - The Franklin Institute
Characters played by Ali Memari
Self - Professor
Characters played by Rosemary Saal
Self - NOLS Field Instructor
Characters played by Tradd Cotter
Self - Microbiologist
Characters played by Tommy Carroll
Self - Systems Engineer
Characters played by Chris LaBar
Self - Train Engineer
Characters played by Anand Varma
Self - National Geographic Photographer
Characters played by Kate Lodvikov
Self - Engineering Manager
Characters played by Alex Cagnola
Self - Propulsion Engineer
Characters played by Carol Houts
Self - Clean Room Specialist
Characters played by Mike McDaniel
Self - Site Leader
Characters played by Darlene Cavalier
Self - Professor
Characters played by Michaela Musilova
Self - Astrobiologist
Characters played by Mike Oprisko
Self - Locomotive Mechanic
Characters played by Erik Oberg
Self - Park Ranger
Characters played by Sean Kahlenberg
Self - Chef
Characters played by John Reilly
Self - Chef
Characters played by Rob Laing
Self - CEO
Farm One
Characters played by ReBecca Hunt-Foster
Self - Monument Paleontologist
Characters played by Fernando Mejia
Self - Designer
Characters played by Lauren Esposito
Self - Assistant Curator of Arachnology
Characters played by Allison Newberg
Self - Park Ranger
Characters played by Alex Lichtblau
Self - Certified Dive Instructor
Characters played by Bruce Mowbray
Self - Train Conductor