The Big Bang Theory (2007– )
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The 43 Peculiarity 

Leonard feels threatened after hearing about Penny's study partner at school, while Howard and Raj become determined to find out one of Sheldon's secrets.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 7 more credits »


Airs Wed. Jan. 23, 9:30 PM on TBS





Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Margo Harshman ... Alex Jensen
Ryan Cartwright ... Cole


Howard has noticed that Sheldon disappears for exactly twenty minutes every afternoon at exactly the same time without telling anyone where he's going or what he's doing. The twenty minutes is listed as free in his calendar. And when Howard and Raj ask him indirectly about that twenty minutes, he evades the question. So Howard and Raj go on a single minded mission to find out where he's going and what he's doing that is so secretive. They try to piece together the evidence they find, but will it lead them to an answer? Leonard isn't joining them in this quest since he's got his own mission. Penny has befriended Cole, a British exchange student in her History class who Leonard is certain is trying to hit on her. Although trusting her somewhat, jealous Leonard does whatever he can to stop Cole indirectly from being her friend (which he equates to hitting on her) so that Penny won't even be tempted. But Leonard himself may be tempted from who to him is an unlikely source. Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


TV-PG | See all certifications »






Release Date:

15 November 2012 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

16:9 HD
See full technical specs »

Did You Know?


This is the last episode not to feature 'Melissa Rauch'. See more »


In the past, Sheldon has been shown to be completely uncoordinated when it comes to any type of sport. Yet he is able to keep a hacky sack in the air for a count of 43. See more »


Howard Wolowitz: I wonder what Sheldon's hiding in there?
Raj Koothrappali: He's always been kind of a weirdo. Maybe he's got Leonard Nimoy chained up in there. Or Bill Gates or Stephen Hawking.
Howard Wolowitz: Why would he chain up Stephen Hawking?
Raj Koothrappali: Howard, shame on you! You can't treat him differently just because he's disabled, that's not okay!
See more »

Crazy Credits


I got nothin'. See more »


References Star Trek (1966) See more »


History of Everything
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Series theme song played during the opening titles]
See more »

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User Reviews

"The 43 Peculiarity" was another very funny ep of "The Big Bang Theory"
8 December 2012 | by tavmSee all my reviews

In this ep of "The Big Bang Theory": Howard and Raj notice that Sheldon leaves the cafeteria at a certain time but find nothing on his schedule to determine what he does. Obviously, they're very curious. Leonard finds out from Penny that she has a study partner in her class, who's British. Yes, he gets jealous. He finds out his name is Cole (Ryan Cartwright) and tries to small-talk with him. Penny finds out and is mad. Oh, and Sheldon's assistant Alex seems to really like Leonard...This was another very funny ep of "The Big Bang Theory" especially when it's revealed what Sheldon does during that time no one else knows about. So on that note, I very much liked "The 43 Peculiarity".

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