Penny's father's name is Wyatt. This contradicts the end of Season 2's "The Maternal Capacitance," where Penny referred to him as "Bob" while opening up to Leonard's mother.
Wyatt says that he wants grandchildren before he dies, but in the season 2 episode "The Hofstadter Isotope", it is revealed that Penny has a nephew, meaning her siblings had a son, which means Wyatt already has grandkids.
Bernadette: So we just sit and stare at the screen waiting for something to happen?
Howard: I did it with you when we rented The Notebook.
Leonard: You'll never guess what happened!
Sheldon: You went out into the hallway, stumbled into an inter-dimensional portal, which brought you 5,000 years into the future, where you took advantage of the advanced technology to build a time machine, and now you're back to bring us all with you to the year 7010, where we are transported to work at the Thinkatorium by telepathically controlled flying dolphins?
Leonard: (short pause) No.
This episode's end titles has Chuck Lorre's Vanity Card #314.
International Airdates: United Kingdom: December 30, 2010 on E4; Turkey: October 11, 2011 on CNBC-e; Czech Republic: November 17, 2011 on Prima COOL; Slovakia: December 1, 2011 on Markiza
Howard: "Yes, Gena Rowlands is a timeless treasure."
Gena Rowlands is the actress that portrayed Older Allie in The Notebook.
Sheldon tells Raj that he (Raj) has difficulty understanding such comic book idioms as "Bamf" and "Snikt".
Bamf refers to the sound that occurs when Nightcrawler teleports.
Snikt refers to the sound effect when Wolverine's blades emerge.
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