Gabor Maté
— Self
Julie Holland
— Self
Rick Doblin
— Self
Ralph Metzner
— Self
Charles Grob
— Self
David Healy
— Self
David E. Nichols
— Self
David Nutt
— Self
Dennis J. McKenna
— Self
Gillian Maxwell
— Self
Ingrid Pacey
— Self
Jeremy Narby
— Self
Kathleen Harrison
— Self
Manuel Schoch
— Self
Michael James Winkelman
— Self
Michael Mithoefer
— Self
Roland Griffiths
— Self
Stanislav Grof
— Self
Stephen Ross
— Self
Wade Davis
— Self
William Richards
— Self
Amanda Feilding
— Self
Chris Bennett
— Self