• 

  Llewellyn M. Smith

  饰：Self - Narrator,7 episodes, 2008,

• 

  Michael Marmot

  饰：Self - Epidemiologist, University College London,2 episodes, 2008,

• 

  Tony de Brum

  饰：Self - Former Minister of Foreign Affairs & Health, Republic of the Marshall Islands,1 episode, 2008,

• 

  Carol Shively

  饰：Self - Comparative Psychologist, Wake Forest University,1 episode, 2008,

• 

  Abacca Anjain-Maddison

  饰：Self - Senator, Republic of the Marshall Islands,1 episode, 2008,

• 

  Tony Iton

  饰：Self - Director, Alameda County Health Dept,2 episodes, 2008, / ...

• 

  Jack P. Shonkoff

  饰：Self - Pediatrician, Harvard Center on the Developing Child,2 episodes, 2008,

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  Angela Glover Blackwell

  饰：Self - CEO, PolicyLink,1 episode, 2008,