Bob Abernethy

Bob Abernethy

饰：Self,3 episodes, 2007-2011, / ...

Lucky Severson

饰：Self,1 episode, 2009,

Doug Vakoch

饰：Self - METI International,1 episode, 2016,

Ted Peters

饰：Self,1 episode, 2016,

万加丽·马萨伊

Wangari Maathai

饰：1 episode, 2007

Ryan McFarland

Ryan McFarland

饰：Self,1 episode, 2009,