Leonard learns the truth about why his mother came to visit on The Big Bang Theory. "The Maternal Conclusion" is the 22nd episode of the show's 12th season.
Amy and Sheldon try to figure out what the supposedly "perfect gift" was that Leonard and Penny gave them on The Big Bang Theory. "The Wedding Gift Wormhole" is the second episode of the show's 12th season.
Amy and Sheldon may end up having their own plan for their wedding on The Big Bang Theory. "The Bow Tie Asymmetry" is the 24th episode of the show's 11th season.
Sheldon heads to Texas to confront his brother, Georgie, on The Big Bang Theory. "The Sibling Realignment" is the 23rd episode of the show's 11th season.
Leonard decides to run against Sheldon to be president of the tenant's association on The Big Bang Theory. "The Tenant Disassociation" is the 19th episode of the show's 11th season.
Howard and Leonard are furious with Sheldon when they learn what he's been up to on The Big Bang Theory. "The Tesla Recoil" is the eighth episode of the show's 11th season.
Leonard explains to Penny how he's angered the physics community on The Big Bang Theory. "The Retraction Reaction" is the second episode of the show's 11th season.
Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget. Raj: Where are we going?