![](https://image.tmdb.org/t/p/w342/ooBGRQBdbGzBxAVfExiO8r7kloA.jpg)
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Sheldon and Bert collaborate on a research project, despite Sheldon’s embarrassment. Also, Penny and Bernadette coach Raj on how to navigate his relationship with Ruchi.
First Air Date : Sep 24, 2007
Last Air date : May 16, 2019
Episode : 279 Episode
Season : 12 Season
Runtime: 22 minutes
Studio: CBS
Country: United States of America