Guest Star: Elka Rodriguez
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