Paul Altmeyer

Self - Host

John Gittinger

Self

Timothy Leary

Self

Sidney Cohen

Self - LSD Expert

James Moore

Self - Chemist

Lyman Kirkpatrick

Self - Former CIA Inspector General

Robert Gordon Wasson

Self

James Thornwell

Self - Army Private (Ret.)

Maurice Dongier

Self - Allan Memorial Institute

Robert Cleghorn

Self

Fidel Castro

Self (archive footage)

Laurence Harvey

Raymond Shaw (archive footage)

Sidney Gottlieb

Self