Ralph Abraham
Himself - Mathematician
Joel Bakst
Himself - Rabbi
Steven Barker
Himself - Pharmacologist
Cynthia Geist
Herself - DMT Study Nurse
Susan Blumenthal
Herself - DMT Volunteer
Patricio Dominguez
Himself - DMT Volunteer
Neal Goldsmith
Himself - Psychologist
Alex Grey
Himself - Artist
Roland Griffiths
Himself - Behavioral Pharmocologist
Charles Grob
Himself - Psychiatrist
Kathleen Harrison
Herself - Ethnobotanist
Terence McKenna
Himself - Writer & Cultural Commentator (archive footage)
Erik Davis
Himself - Writer
Graham Hancock
Himself - Writer
James Kent
Himself - Writer
Dennis J. McKenna
Himself - Ethnopharmacologist
Ralph Metzner
Himself - Psychologist
Christian Meuli
Himself - DMT Volunteer, Family Physician
Jeremy Narby
Himself - Anthropologist
Andrew Newberg
Himself - Radiologist
David Nichols
Himself - Medicinal Chemist
Daniel Pinchbeck
Himself - Writer
Douglas Rushkoff
Himself - Writer
Spiros Antonopoulos
Himself - DMT Volunteer, Yoga Student
Leanna Standish
Herself - Naturopathic Physician
Andrew Stone
Himself - DMT Volunteer, Software Developer
Rick Strassman
Himself - Psychiatrist
Robert Weisz
Himself - DMT Volunteer, Clinical Psychiatrist
José Pineda Vargas
Himself
Ede Frecska
Himself - Psychopharmacologist
