Bernadette and Amy bring the Death Star Cake to the Star Wars Day celebration.
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After having an emotional dream, Sheldon hugs Leonard to show he cares.
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Amy and Bernadette make a Death Star Cake to celebrate Star Wars Day.
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Leonard and Penny attend a funeral and pay respects on May 4th.
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Sheldon, Howard and Raj start celebrating Star Wars Day on May 4th.
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Sheldon watches an episode of Professor Proton's show.
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Penny talks to Sheldon before going to the funeral.
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Leonard consoles Sheldon after letting him know a hero of his died.
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TBBT Quotes

I was expecting applause but I suppose stunned silence is equally appropriate.

Sheldon

Sheldon: Nothing more fun than a paradigm shifting evening of science.
Penny: (to Leonard) And you thought it was soaping me up in the shower.