Joe Rogan

Himself - Host

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

Mitch Schultz