The Guitarist Amplification Season 3, Episode 7 -  Aired November 9, 2009

The Guitarist Amplification

When Penny invites Justin, an old boyfriend, to stay at her apartment for a weeks, it sparks an argument between her and Leonard. Their fighting makes Sheldon uncomfortable as it reminds him of his parents' arguments.

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Guest Stars: Kevin Sussman as Stuart, Carol Ann Susi as Mrs. Wolowitz

Writers: Chuck Lorre (Story), Lee Aronsohn (Story), Bill Prady (Teleplay), Richard Rosenstock (Teleplay), Jim Reynolds (Teleplay)

Director: Mark Cendrowski

Viewers: 12.795 million Households Rating: 7.9/12 Adults 18-49 Rating: 4.7/11

Available on iTunes

Episode Notes

  • The title refers to Penny's ex-boyfriend Justin, a guitarist, whose planned stay in Penny's apartment sparks an argument between Penny and Leonard.
  • This episode was previously titled "The Wandering Troubador Catalyst".

> Sheldon's Knock

Sheldon uses his knock when he goes over to Raj's apartment after Leonard and Penny's arguing upset him. Sheldon knocked on the door even though it was already open.

Episode Quotes

Sheldon: Stop it both of you! All this fighting, I might as well be back with my parents!
*Imitating his Mom* Dammit, George! I told you if you didn't quit drinking I would leave you!
*Imitating his Dad* Well, I guess that makes you a liar, because I'm drunk as hell and you are still here!
*Imitating his Mom* Stop yelling, you're making Sheldon cry!
*Imitating his Dad* I'll tell you what is making Sheldon cry, that I let you name him SHELDON!

Sheldon: You can't make a half sandwich. If it's not half of a whole sandwich, it's just a small sandwich.

Sheldon: Leonard, when that woman moved in three years ago I told you not to talk to her, and now look. We're going to be late for the movies.

Rajesh: Excuse me but I don't think Penny is out of line at all. You don't own her. It's like my girl Beyonce says: If you like it you should've put a ring on it.

Raj: Sorry doesn't make up for the fact that I had to cook chicken and rice with this vegan guy. You know what vegan chicken and rice is? It's rice!


Sheldon, Leonard and Penny are playing Research Lab, the game Sheldon invented, when Penny reveals she's going to pick up her friend Justin from the airport and he'll be staying with her. Leonard is shocked that Penny will be having a guy stay with her and wonders what kind of friends they are, causing an argument between him and Penny. Sheldon gets upset that they're fighting and goes over to the blender to try drown out the noise.

When Leonard continues to fret about Penny's house guest while driving Sheldon to work, Sheldon gets uncomfortable and decides to walk to work instead. As Leonard returns home he runs into Penny, who hopes he's ready to apologize for his behavior. Leonard won't apologize and so he and Penny have another argument, causing Sheldon to run off. At the comic book store, Howard and Raj chime in on Leonard & Penny's predicament, but their discussion descends into yet another argument. Sheldon is once again upset by fighting and leaves.

While having lunch at the Cheesecake Factory, Sheldon tries to play peace maker and convince Penny to apologize to Leonard, but she is not moved. Sheldon returns home to try change Leonard's mind and get him to say sorry, but at that moment Penny storms in angry about Sheldon's intervention. Sheldon flees to Raj's apartment, but he is in the middle of an argument with his parents.

After looking for their missing friend, Leonard and Penny find that Sheldon has taken refuge at the comic book store. Leonard and Penny try convince Sheldon that they're done fighting, but it's clear their issue is far from settled. In a bid to cheer Sheldon up, Penny and Leonard buy him a toy robot and a comic book to get him to come home. Finally, Penny and Leonard's argument seems settled when her friend Justin stays on Sheldon's couch instead of Penny's apartment.