The Big Bang Theory (2007–2019)
2 user 1 critic

The Classified Materials Turbulence 

Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 4 more credits »




Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Kevin Sussman ... Stuart Bloom
Robert Clotworthy ... Astronaut (voice)
Travis Davis ... Ground Controller (voice)


Despite how poorly their first and only date ended (albeit the poorness caused by Sheldon), Stuart and Penny are going out on a second date. Not wanting to screw things up, Stuart asks Leonard for advice on Penny's expectations of the date getting "physical". Penny also asks Leonard for advice on how to get Stuart to come out of his shyness shell. Leonard doesn't want Stuart and Penny's relationship to advance, but he doesn't want to lose either as friends. Leonard ends up giving Stuart what he considers some intentionally bad advice. Feeling guilty about it, he tries to find out what happened on their date so that he can clear his conscience. Meanwhile, Howard has completed the International Space Station's "Wolowitz Zero Gravity Human Waste Disposal System" (i.e. their toilet). After it's been deployed to the station, Howard realizes that he made an error in his calculations, and the system will fail within ten flushes. He has to figure out how to fix the problem only using ... Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


TV-PG | See all certifications »

Did You Know?


The box Stuart removes the comics from in the background of the opening scene actually is an authentic Diamond Distributors shipping box. Up until the post-pandemic re-organization of the comics industry in mid-2020, Diamond was the exclusive distributor for all major comics companies. See more »


In the opening scene, Stuart is removing new comics from their shipping box, to the left of the cash register, and putting the stack of books on the counter to the right of the register. After the next cut-away, the box has moved to the right side, into the space Stuart was using to check in the books. See more »


[first lines]
Sheldon Cooper: Smell that? That's the smell of new comic books.
[takes a deep breath]
Sheldon Cooper: Oh, yes!
Howard Wolowitz: They're on me today, boys.
Rajesh Koothrappali: You're paying? Have you been selling your sperm again?
Leonard Hofstadter: No, I'm celebrating. As we speak, the space shuttle is docking at the International Space Station, where it will deploy the Wolowitz Zero-Gravity Waste Disposal System.
Rajesh Koothrappali: Oh, get over yourself. It's a high-tech toilet.
Leonard Hofstadter: Just think, thanks to your hard work, an international crew of astronauts will boldly go where no man has gone ...
See more »

Crazy Credits

CHUCK LORRE PRODUCTIONS, #250 For months I've woken up to a mysterious, intermittent banging sound coming from somewhere in my home. I can't tell you how many mornings I groggily walked around in my pajamas searching for its cause. Frustrated by my inability to locate the source of the banging, I falsely accused my ancient refrigerator and began seeking a replacement. But then I caught a break. Rising early one morning for reasons urinary, I stumbled across the real source of the strange noise - - a small, yellow-breasted bird living the a tree next to the kitchen window. Periodically, he would fly to the window, furiously peck at it with his beak, then quickly retreat to a nearby branch. At first I assumed that the morning light caused him to see his reflection and, being of limited intelligence, or filled with self-loathing, attack it. But once again, my initial instinct proved to be wrong. After a long conversation with the bird, I learned that he was banging on the window because he had it in for my refrigerator. I have since apologized to the fridge, but it has been, not surprisingly, cool towards me. Sorry, that really wasn't worth the journey. See more »


References Snatch (2000) See more »


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

User Reviews

Frequently Asked Questions

This FAQ is empty. Add the first question.






Release Date:

4 May 2009 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

16 : 9
See full technical specs »

Contribute to This Page

Recently Viewed