Sheldon plans a huge birthday surprise for Amy while Leonard, Raj and Howard take Wil Wheaton with them to see the new Star Wars movie.
Professor Proton pays Sheldon a visit after Sheldon suffers a tragic loss. Meanwhile, Leonard can't help competing with Penny when they reach a milestone in their relationship, and Amy and Bernadette treat the guys by making them a Star Wars Day gift.moreless
When Professor Proton seeks advice from Leonard, Sheldon is hurt and contacts Bill Nye. Howard interrupts Raj’s girls night out.
When Sheldon and Leonard learn their favorite TV scientist is available to hire, they seek to do so. Howard and Bernadette are tasked with watching Raj's dog.
A series of classic clips from the show's first six years interspersed with stories of family life by celebrities.