约翰·肯尼迪

John F. Kennedy

饰：Himself

Hunter Lovins

饰：Herself

Pete McCloskey

饰：Himself

Dennis Meadows

饰：Himself

Stewart L. Udall

饰：Himself

Stewart Brand

Stewart Brand

饰：Self

比尔·克林顿

Bill Clinton

饰：Self,(archive footage)

Denis Hayes

Denis Hayes

饰：Self

Gaylord Nelson

饰：Self (senator),(archive footage)

蕾切尔·卡森

Rachel Carson

饰：Self,(archive footage)

保罗·埃利希

Paul Ehrlich

饰：Self

Russell Schweickart

饰：Self