The Big Bang Theory - Season 9, Episode 9
  • Episode Title: The Platonic Permutation
  • Episode Run Time: 30
  • Episode Air Date: 2015-11-19 20:00
  • Episode Summary: Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.