The Classified Materials Turbulence

Cast

• 

  Johnny Galecki

  Leonard Hofstadter

• 

  Jim Parsons

  Sheldon Cooper

• 

  Kaley Cuoco

  Penny

• 

  Simon Helberg

  Howard Wolowitz

• 

  Kunal Nayyar

  Rajesh Koothrappali

• 

  Kevin Sussman

  Stuart Bloom

• 

  Travis Davis

  Ground Controller (voice)

• 

  Robert Clotworthy

  Astronaut (voice)