The Big Bang Theory (2007– )
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The Good Guy Fluctuation 

Sheldon tries to get into the spirit of Halloween by trying to scare the guys after they prank him. Leonard seeks Penny's advice when an attractive comic book artist takes an interest in him.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 6 more credits »

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Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Melissa Rauch ... Bernadette Rostenkowski
Kevin Sussman ... Stuart Bloom
Aarti Mann ... Priya Koothrappali
Courtney Ford ... Alice


Leonard is nonplussed when he is approached by a beautiful woman named Alice while they're both in the comic book store. He figures that her interest in him is purely on that comic book level, especially when he finds out that she is a comic book artist herself. But he soon finds out that her interest in him also extends to the carnal. Leonard doesn't know what to do about the situation. For him, Alice may be that perfect and rare woman - both a nerd and beautiful - but he doesn't want to risk ruining his relationship with Priya, who he sees could one day be his wife and despite their current long distance relationship not being totally satisfying. He turns to the only one of his friends who has any relationship experience, Penny, for advice. He realistically wants her to tell him that he can have his cake and eat it too. Meanwhile, Sheldon is trying to get back at Leonard, Howard and Raj for a Halloween prank they pulled on him which made him both faint and relieve himself of some ... Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


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English | Greek

Release Date:

27 October 2011 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

16:9 HD
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Did You Know?


This is the last time Priya Koothrappali is seen on the show. See more »


Sheldon scares Leonard at the end of the Episode by hiding inside the couch. His feet are beneath the right section ("Sheldon's Spot") while his head is beneath the left section. Considering Sheldon forbidding anyone else to sit on "his Spot", he could not have assumed that Leonard would do so. If Leonard sat down on another place, Sheldon would not have been able to pop out of the couch and scaring Leonard. See more »


Priya: [after confessing he kissed another woman] Leonard, relax. It's ok.
Leonard Hofstadter: It is?
Priya: Yeah. These things happen. They happen to everybody.
Leonard Hofstadter: Oh my God, you are amazing. I mean, I don't deserve you. Wh-what do you mean everybody?
Priya: Leonard, I didn't know if I should tell you, but, I kind of cheated on you, too.
Leonard Hofstadter: Kind of?
Priya: A couple of weeks ago, I slept with my ex-boyfriend. So I guess we both messed up a little.
Leonard Hofstadter: No, no, I messed up a little, you messed up a lot.
Priya: Well, it's not a competition.
Leonard Hofstadter: Oh, yeah it is, and ...
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Crazy Credits

CHUCK LORRE PRODUCTIONS, #363 Was there an original thought to be thunk? Or was he forever doomed to be an emulator, or worse, a regurgitator? And if he was, so what? Doesn't every college sophomore majoring in English because they have no freaking clue what to do with their life know that disdaining the derivative is the height of unoriginality? More importantly, what was the likelihood that he could keep writing without landing on even one declarative sentence? And why did he use the idiot word "thunk"? Is he actually an idiot? Or is he wildly clever? Will we find out one day? Who knows? Who cares? Should he continue trying to write a vanity card when he has a raging flu and is so heavily intoxicated from a potpourri of over-the-counter cold medications that he keeps referring to himself in the third person? Probably not. See more »


References Pulp Fiction (1994) See more »


History of Everything
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Series theme song played during the opening titles]
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User Reviews

"The Good Guy Fluctuation" is another great ep of "The Big Bang Theory"
21 November 2011 | by tavmSee all my reviews

In a nutshell of this ep of "The Big Bang Theory" from this season: Sheldon keeps getting pranked by his friends but he seems to fail to do the same to them. Meanwhile, Leonard has found a hot girl at a comic store and manages to get a date with her. Her name is Alice and she's interested in a comic Leonard is also getting. Since at this point Leonard still has a long distance relationship with Priya, he now has an issue to grapple with. I'll stop there and just say how hilarious it is to see Sheldon trying to get the best of one-upping on his friends' Halloween tricks and his reactions to them. And seeing Leonard trying to get advice from both Penny and Sheldon is also something to see. Don't want to say anymore so on that note, "The Good Guy Fluctuation" is another very worthy ep of "The Big Bang Theory".

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