Joe Rogan

Self - Host

Ralph Abraham

Self - Mathematician

Joel Bakst

Self - Rabbi

Steven Barker

Self - Pharmacologist

Cynthia Geist

Self - DMT Study Nurse

Susan Blumenthal

Self - DMT Volunteer

Patricio Dominguez

Self - DMT Volunteer

Neal Goldsmith

Self - Psychologist

Alex Grey

Self - Artist

Roland Griffiths

Self - Behavioral Pharmocologist

Charles Grob

Self - Psychiatrist

Kathleen Harrison

Self - Ethnobotanist

Terence McKenna

Self - Writer & Cultural Commentator (archive footage)

Erik Davis

Self - Writer

Graham Hancock

Self - Writer

James Kent

Self - Writer

Dennis J. McKenna

Self - Ethnopharmacologist

Ralph Metzner

Self - Psychologist