The Big Bang Theory: Season 3, Episode 15

The Large Hadron Collision (8 Feb. 2010)

TV Episode  |  TV-14  |   |  Comedy
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 8.2/10 from 1,431 users  
Reviews: 1 user | 2 critic

When Leonard is offered a trip to Switzerland on Valentine's Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.



(created by), (created by), 6 more credits »
0Check in

Watch Now

From $1.99 on Amazon Video

« Previous Episode | 56 of 196 Episodes | Next Episode »


1 video »


Episode complete credited cast:


Valentine's Day is approaching. Leonard thinks he's hit some good luck in that he has been asked to attend a conference and view the Hadron super collider in Switzerland during Valentine's. He's allowed to bring a guest with him which he has chosen to be Penny. There, the two can have a romantic first Valentine's Day together. This decision doesn't sit well with Sheldon who has always dreamed of seeing the collider. Sheldon does whatever he can to make Leonard change his mind, including reminding him of their documented roommate agreement. But the harder Sheldon tries to convince Leonard to change his mind, the more Leonard seems to resist. But outside forces may end up deciding for Leonard who will accompany him to Switzerland. Written by Huggo

Plot Summary | Plot Synopsis




See all certifications »





Release Date:

8 February 2010 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

See  »

Did You Know?


When Sheldon is playing the car game with Leonard of ranking historical by the heinous of their acts, he includes Rupert Murdock, Darth Vader and Leonard Hofstafer. Unfortunately, Darth Vader is a fictional rather than historical figure. See more »


When Leonard is trying to get Penny to guess where they will spend Valentine's Day, Penny guesses The Matterhorn at Disneyland. After Leonard asks how that will require air travel she guesses The Matterhorn at Disney World. The Matterhorn is not an attraction at Disney World. See more »


[first lines]
Howard Wolowitz: [on cellphone] ... Sweetie. Uh, listen, I need to go, but I'll see you tonight? Bye-bye. Bye-bye. B- No, *you* hang up first. Hello?
Raj Koothrappali: Dude, I'm glad you finally got a girlfriend, but do you *have* to do that lovey-dovey stuff in front of those of us who don't?
Sheldon Cooper: Actually, he might have to. There's an economic concept known as a positional good, in which an object is only valued by the possessor because it's not possessed by others. The term was coined in 1976 by economist Fred Hirsch ...
See more »

Crazy Credits

CHUCK LORRE PRODUCTIONS, #277 Belarus is a small, land-locked country next door to Russia, Ukraine, Latvia, Lithuania and Poland. According to Wikipedia, one of its major exports is cattle by-products. Which begs the question, what horrible shape are the cattle in, if all they're good for is felt hats and wallpaper paste? But Belarus does have a bustling TV production industry. One of their most recent hits is a sitcom about four nerdy scientists who live next door to a beautiful blonde waitress. The characters are named Sheldon, Leo, Hovard, Raj and Natasha, and the show is entitled, The Theorists. Each episode begins with a rapid-fire montage of images which takes us from the dawn of time to the present moment. Keeping with that theme, the montage is scored with what is probably the worst piece of recorded pop music since the dawn of time. And finally, each episode appears to be a Russian translation of a Big Bang Theory episode. When we brought this to the attention of the Warner Brothers legal department, we were told that it's next to impossible to sue for copyright infringement in Belarus because the TV production company that is ripping us off is owned and operated by the government of Belarus. Having no other recourse, I'm hoping that this vanity card will be read by the fine folks making The Theorists, and, wracked with guilt, they break down and send us some felt hats. The Kyrgyzstan version of Dharma & Greg already sent me some wallpaper paste. See more »


References Star Wars: Episode IV - A New Hope (1977) See more »


Morning Mood
Written by Edvard Grieg
Performed by Jim Parsons
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

"The Large Hadron Collision" is another funny enough episode of "The Big Bang Theory"
5 March 2011 | by (Baton Rouge, La.) – See all my reviews

This episode of "The Big Bang Theory" in a nutshell: Leonard has been invited to Switzerland to witness an important event with the option of taking someone along so Sheldon thinks he's the one. But since it's Valentine's Day and there's skiing there as well, Penny is the one picked. This doesn't sit will with Sheldon who invokes the roommate clause, makes Leonard breakfast in bed, and laying a guilt trip to Penny to no avail. Then Penny gets a massive cold. But so does Sheldon...Another very funny, if not completely hilarious, ep of "The Big Bang Theory" especially whenever Sheldon plays with his throat to sound like Froggy from Our Gang. Oh, and Howard and Raj are their usual funny selves too. So on that note, "The Large Hadron Collision" is another funny enough ep of this smartly written sitcom.

3 of 4 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
OT: Thanksgiving Day/Black Friday Gothish
Kaley Cuoco reportedly pregnant after reigniting romance with ex Johnny kissmad
Sheldon will not tolerate being mediocre in bed Miss_Georgia
Why is this season so short? TyrionForPresident
The Show would be soooo much better without Bernadette martavisgriffin
Penny gets angry, Leonard grovels Lunch_Box22
Discuss The Large Hadron Collision (2010) on the IMDb message boards »

Contribute to This Page