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

The Collaboration Fluctuation 

Leonard, Penny and Raj adjust to their new living arrangements; Sheldon expresses an interest in Amy's work.



(created by), (created by) | 6 more credits »

Watch Now

From $1.99 (SD) on Amazon Video




Episode complete credited cast:
Halley Wolowitz (voice)


Raj has now moved in with Leonard and Penny. Instead of a roommate for both of them, what Raj becomes is Penny's closest girlfriend, with Leonard feeling left out. It's not even so much that Leonard feels like a third wheel or that Raj is having a better time with his wife than he is that is the problem in Leonard's rational deduction about his emotions. Leonard turns to Howard and Bernadette for solace and advice, they who may be able to provide a different perspective on the matter. Meanwhile, Sheldon has taken an interest in Amy's work on the neuroscience of the decision making process. He believes that throwing a little physics into the mix would lead to a truly revolutionary project, to which Amy agrees. Even with ground rules laid out, Amy and Sheldon have to decide if the successes in the project are worth the anguish of the arguments and name calling which may ultimately ruin their personal relationship. Written by Huggo

Plot Summary | Add Synopsis


Comedy | Romance







Release Date:

30 March 2017 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

16:9 HD
See  »

Did You Know?


Amy, a biochemist with a background in brain function says, about their finally making progress but only while fighting: "I suppose it's conceivable that the hormones associated with our fight or flight response could be sharpening our cognitive processes."

She is 180 degrees off, for, and here is the actual science: Norepinephrine is the first neurotransmitter to trigger a protective state when we are under attack, which cascades a rush of "fight or flight" chemicals such as adrenaline, noradrenaline and cortisol, normally associated with survival. In this defensive state, the primitive part of the brain interferes with rational thinking and the limbic system knocks out most of the working memory, physically causing narrow-mindedness.

Those hormones would do the exact opposite and shut down any possible progress. See more »


[first lines]
Raj Koothrappali: So, Downward Facing Dog comes from the Sanskrit phrase Adho Mukha Svanasana.
Penny Hofstadter: Oh, that's beautiful. What does it mean?
Raj Koothrappali: Downward facing dog.
Penny Hofstadter: Yeah, I guess they don't have Sanskrit for butts up and heads down.
Raj Koothrappali: Hey, we wrote the Kama Sutra; if it involves butts there's a word for it.
See more »


References Star Trek (1966) See more »


History of Everything (Instrumental version)
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Instrumental version of series theme song played over the closing credits]
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Well Beyond its Prime
1 April 2017 | by (United States) – See all my reviews

Alas, but the show is well beyond its prime. Still watch because there is little to compete with it, but the story line has become very thin, too many actors given a few lines each, only 18 minutes of story vs a normal 22, and let's face it, what is there left for the writers to come up with? All the stories have been done. The main story in this one, between Sheldon and Amy, has been worn out on the show. And the best second story is "wanna go to Target with us to get some diapers?" Weak. I did not laugh one time during the show, which is becoming common with all of the new ones.

12 of 13 people found this review helpful.  Was this review helpful to you?

Contribute to This Page

Create a character page for: