Guest Star: Elka Rodriguez

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  The Geology Methodology
  Season 11, Episode 7 - Aired November 9, 2017

  When Bert offers Sheldon the chance to work with him to research dark matter, Sheldon is ashamed to be interested in working on a geology project and tries to keep the collaboration a secret.

  Meanwhile, Raj gets advice from Penny and Bernadette when Ruchi agrees to go out on a date with him, but wants to keep things casual.

  Appeared as Rose Lady