[s9e9] The Platonic Permutation -

While preparing dinner, Leonard inadvertently reveals he knows intimate details about Penny's life that she never told him—leading Penny to realize he has been reading her private journal. Key Details & Trivia

Amy reveals she has been on six dates with three different men since their breakup. Episode Information Series/Season The Big Bang Theory , Season 9, Episode 9 Original Air Date November 19, 2015 Director Mark Cendrowski Key Cast [S9E9] The Platonic Permutation

To avoid awkwardness, Sheldon prepares topics like pets, vacations, and the weather. While preparing dinner

Information Leonard learned from Penny's journal included the fact that she had a pet pig named Moondance and a dog named Pepper . Sheldon prepares topics like pets