The Big Bang Theory (2007– )
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The Cognition Regeneration 

Leonard is less than thrilled when Penny considers accepting a job offer from Zack, her ex-boyfriend. Howard teaches Sheldon new things.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 6 more credits »

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Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny Hofstadter
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Mayim Bialik ... Amy Farrah Fowler
Melissa Rauch ... Bernadette Rostenkowski
Brian Thomas Smith ... Zack Johnson


An event demonstrates to Sheldon that his cognitive abilities are weakening. This thought dismays him for many reasons, including the fact that his time to come up with a Nobel award winning project is getting shorter and shorter. Sheldon having read that taxing one's mental skills makes them sharper, his friends come up with different ideas as skills that Sheldon may learn to help him feel like his mental acuity is strengthening. In the process, Amy comes to some conclusions, including that Sheldon's task is a catch-22 proposition for failure. Meanwhile, Penny, Amy and Bernadette, on a girls' night out, run into Penny's old boyfriend, Zack, who has among his news that he is engaged. He proposes that he, his fiancée, Penny and Leonard go out as a foursome to catch up, Zack who has always liked Leonard. Leonard reluctantly agrees. That reluctance is strengthened when, at dinner, an issue comes to light about Penny's current life, with Zack coming up with a proposition to solve that ... Written by Huggo

Plot Summary | Add Synopsis


Comedy | Romance


TV-14 | See all certifications »





English | Hindi

Release Date:

27 April 2017 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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Did You Know?


Another one of her many talents, actress Melissa Rauch actually did her own ventriloquism in the scene where she has Tammy Jo St Cloud talk to her husband, Howard. See more »


In the beginning sequence when Sheldon is seen on the couch with his computer open and sitting in his lap; as the series of scenes progresses we observe his laptop magically closed then re-opened. When we finally see him close his laptop there is an audible thump as the screen contacts the keyboard. This sound is not heard in the previous scene where the laptop magically closes and opens. A second error occurs with the pillow that Sheldon is leaning on. It appears in different positions throughout this series of scenes. See more »


[first lines]
Leonard Hofstadter: We're pinned down!
Howard Wolowitz: We can't get through!
Raj Koothrappali: Sheldon, get over here and help!
Sheldon Cooper: OK, one second.
Leonard Hofstadter: Sheldon, why are you jumping up and down?
Sheldon Cooper: I'm trying to shoot!
Howard Wolowitz: Then use the 'Shoot' button not the 'Wonderful-thing-about-Tiggers' button!
Leonard Hofstadter: Aaaw.
Raj Koothrappali: That's it. We're dead.
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References Deadpool 2 (2018) See more »


History of Everything
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Series theme song played during the opening titles]
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User Reviews

If you don't have any idea about a language don't use it
29 April 2017 | by ajain0729See all my reviews

In this episode I was disappointed by the makers of The big bang theory. There was no comedy like they used to do.

I'm from India, and I was deeply hurt when sheldon used Hindi in comic book store, It was so wrong that I could not understood a word form the sentence. Please guys what happened to you. Do some research before throwing words in the show.

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