The Contractual Obligation Implementation Season 6, Episode 18 -  Aired March 7, 2013

The Contractual Obligation Implementation

Leonard, Sheldon and Howard visit Howard's old school to speak to junior high girls about careers in science. Meanwhile, Raj plans his first formal date with Lucy, while the girls visit Disneyland and dress up as Disney princesses.

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Guest Stars: Kate Micucci as Lucy, Brian Posehn as Bert, Piper Mackenzie Harris as Girl #1, Diamond White as Girl #2, Dawson Fletcher as Justin

Writers: Chuck Lorre (Story), Eric Kaplan (Story), Steve Holland (Story), Steven Molaro (Teleplay), Jim Reynolds (Teleplay), Maria Ferrari (Teleplay)

Director: Mark Cendrowski

Viewers: 17.63 million Households Rating: 11.3/18 Adults 18-49 Rating: 5.5/17

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Episode Notes

  • The title refers to the guys' obligation to serve on a committe at the university which is tasked with getting more women into science. Sheldon decides they should reach out to girls at the middle-school level to help them get on an academic path towards the sciences.

Episode Quotes

Bernadette: We can't all be Cinderella.
Amy: Then how do we decide?
Bernadette: Well, it's simple. This was my idea. I'm driving. I'm Cinderella. You bitches got a problem with that, we could stop the car right now.

Sheldon: (Typing into a search engine) How do I get 12-year-old schoolgirls excited?
Howard and Leonard: No!

Bernadette: Every one of you has the capacity to be anything you want to be.
Penny: Unless you want to be Cinderella.
Bernadette: Come at me. See what happens!

Leonard: So now let's bring out theoretical physicist, Dr, Sheldon Cooper.
Sheldon: Hello, female children. Allow me to inspire you with a story about a great female scientist. Polish-born, French-educated Madame Curie. Co-discover of radioactivity. She was a hero of science until her hair fell out, her vomit and stool became filled with blood, and she was poisoned to death by her own discovery. With a little hard work, I see no reason why that can't also happen to any of you. Are we done? Can we go?

Sheldon: Some people are otters, some people are rocks.

News Stories

Title Date Posted
Episode 6.18 Ratings March 8, 2013

Last night's episode of The Big Bang Theory finished first place in the ratings for its time slot and ranked as the night's most-watched and highest-rated broadcast.  Full story

CBS Announces Episode 6.18 February 15, 2013

CBS has issued the press release for the March 7 episode of The Big Bang Theory. Kate Micucci guest stars as Lucy, Raj's love interest, in the episode.  Full story


Leonard, Howard and Sheldon are gathered in the apartment when Leonard reminds them the university is requiring them to come with ideas on how the university can help get more women into the sciences. Sheldon suggests instead of trying to tackle the problem at a university level, they should reach out girls at the middle-school level to help put them on an academic path towards science. Howard thinks they should call his old middle school to see about the guys going over to talk to the young women about science. Meanwhile, Raj is with the girls in Penny's apartment trying to think of a place to take Lucy on their next date. When Bernadette suggests Disneyland, Raj doesn't think a crowded amusement park is a good place for their date. The girls, however, decide it would be fun to ditch work and visit Disneyland themselves.

The guys arrive at Howard's old school to give a talk about science. They fail to impress the students with their presentation, and things only get worse when Leonard starts rapping. Meanwhile, the girls are on their way to Disneyland and decide they should get princess makeovers, though they all want to be Cinderella. Elsewhere, Raj is having a texting date with Lucy at the library.

Back at the school, Sheldon realizes their talk with the middle-school girls has likely put many of them off the sciences. Sheldon calls Bernadette and Amy so they can talk, over the phone, to the girls in the class. As Amy and Bernadette talk about the opportunities available to young women, they're dressed as Disney princesses while Penny is unhappy she couldn't be Cinderella. Elsewhere, Lucy thanks Raj for a good date.

Later, the girls return home to their guys dressed as their Disney princess. Howard is delighted to see Bernadette is Cinderella and is ready to be her Prince harming. Leonard starts undressing as soon as he sees Penny dressed as Sleeping Beauty. Sheldon, however, has no interest in giving Snow White, Amy, the kiss she needs to wake up.