When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try to meet one of their idols. Meanwhile, when Bernadette and Howard battle over the fate of his Dr. Who TARDIS, Raj and Amy offer to ...
The guys are stranded in the middle of nowhere when Leonard's car is stolen on the way to the Bakersfield Comic-Con. Back home, the girls try to figure out why the guys are so fascinated with comic books.
Sheldon gets Alex to buy a Valentine's Day gift for Amy. Leonard and Penny and Howard and Bernadette have a disastrous dinner together. Raj and Stuart host a "Lonely People" party at the comic book store.
A date between Raj and Lucy takes both of them out of their comfort zones. After a trip to Las Vegas goes awry, the girls join in on a Dungeons and Dragons game, which causes Amy and Sheldon to re-evaluate their relationship.
Howard tries to do something special to celebrate the anniversary of his first date with Bernadette. Sheldon is conflicted when he makes a major scientific breakthrough but some details have to be corrected.