Elenco (na ordem dos créditos)
Michael Stevens
Self - Host
Trin Miller
Scientist
Philip Zimbardo
Self
Alie Ward
Robin Carhart-Harris
Dominic Monaghan
Mary Mouser
Mary
Adam Savage
Rosanna Pansino
Keller Wortham
Cory Kirk
Cory
Veronica Merrell-Burriss
David Levy
Self - Social Psychologist
Judy Ho
Self - Clinical & Forensic Psychologist
Vanessa Merrell
Timothy DeLaGhetto
Derek Muller
Henry Mark
Dan Markham
Jake Roper
Christina Maslach
Warren Lee
ATOR
Derek Paravicini
Lincoln Markham
Kevin C. Fredrick
Actor
Marnie Stevens
Mike Muratore
Surveyor #1
Ron Mossler
William Brown
India Pearl
Mike Ferguson
Thief
Caitlin Doughty
Zeus Ley
Kelvin Blunt
Security Chief
Max More
Dave Eshelman
Linda Chamberlain
Tim Marzullo
Ashton Mathieu
Asher
Tetsuro Matsuzawa
Douglas Vakoch
Self - President of METI International
Stephen T. Asma
Christy Berry
Nurse Margaret Dix
Skylar Lanning
Self - Test Subjectuncredited
Rina Johnson
Spooky Little Girluncredited