Characters played by Trevor J. Roling
narrator in English version
Characters played by Hanspeter Müller
narrator in German version
Characters played by Mario Scarabelli
narrator in Italian version
Characters played by Albert Hofmann
Self
Characters played by Stanislav Grof
Self - psychiatrist
Characters played by Martin A. Lee
Self - author
Characters played by James S. Ketchum
Self - U.S. Army Colonel (Retired)
Medical Corps
Characters played by Franz X. Vollenweider
Self - neuroscientist
University of Zürich
Characters played by Ken Kesey
Self
Characters played by Carolyn Garcia
Self - Merry Pranksters
Characters played by Timothy Leary
Self
Characters played by Ralph Metzner
Self - psychologist
Characters played by Nick Sand
Self - Millbrook Mansion
Characters played by Ronald Reagan
Self
Characters played by John Lennon
Self