Self - Host Joe Rogan

Self - Mathematician Ralph Abraham

Self - Rabbi Joel Bakst

Self - Pharmacologist Steven Barker

Self - DMT Study Nurse Cynthia Geist

Self - DMT Volunteer Susan Blumenthal

Self - DMT Volunteer Patricio Dominguez

Self - Psychologist Neal Goldsmith

Self - Artist Alex Grey

Self - Behavioral Pharmocologist Roland Griffiths

Self - Psychiatrist Charles Grob

Self - Ethnobotanist Kathleen Harrison

Self - Writer & Cultural Commentator (archive footage) Terence McKenna

Self - Writer Erik Davis

Self - Writer Graham Hancock

Self - Writer James Kent

Self - Ethnopharmacologist Dennis J. McKenna

Self - Psychologist Ralph Metzner

Self - DMT Volunteer, Family Physician Christian Meuli

Self - Anthropologist Jeremy Narby

Self - Radiologist Andrew Newberg

Self - Medicinal Chemist David Nichols

Self - Writer Daniel Pinchbeck

Self - Writer 输精管壶腹

Self - DMT Volunteer, Yoga Student Spiros Antonopoulos

Self - Naturopathic Physician Leanna Standish

Self - DMT Volunteer, Software Developer Andrew Stone

Self - Psychiatrist Rick Strassman

Self - DMT Volunteer, Clinical Psychiatrist Robert Weisz

Self Ricardo Amaringo

Self Alvin Joseph

Self Jon Levin

Self Aja Loux

Self José Pineda Vargas

Self Jordan Phillips

Self Jose Plaza

Self Mitch Schultz

Self Rob Velez

Self Fermin Quintuna

Self - Psychopharmacologist Ede Frecska