You are viewing a list of 1 The Big Bang Theory episode featuring "Spaghetti" in their title.
  • The Spaghetti Catalyst

    Season 3, Episode 20 - The Spaghetti Catalyst
    Aired May 3, 2010

    Leonard and Penny aren't talking to each other following their break-up, leaving Sheldon unsure how he to be friends with them both. Sheldon feels guilty about spending time with Penny, thinking it's a betrayal of his friendship with Leonard.