伯纳德·希尔

Bernard Hill

饰：Self - Narrator,

Bill Andrews

饰：Self - Sierra Sciences,(as Dr Bill Andrews)

Rochelle Buffenstein

饰：Self - University of Texas,(as Prof Rochelle Buffenstein)

Nir Barzilai

饰：Self - Albert Einstein College of Medicine,(as Prof Nir Barzilai)

Ellen Langer

饰：Self - Harvard University,(as Prof Ellen Langer)