Steven Jefferts

Actor

• 
  Secretos del universo con Morgan Freeman (Serie TV) (2010 - 2017)
  Papel: Self - Atomic Scientist
  
  9.0
• 
  Modern Marvels (Serie TV) (1993 - )
  Papel: Self - Physicist, NIST
  
  8.0
• 
  Nova (Serie TV) (1974 - )
  Papel: Self - NIST
  
  7.5