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.



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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

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Comedy | Romance


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Release Date:

27 April 2017 (USA)  »

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Aspect Ratio:

16:9 HD
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Did You Know?


This episode was taped on April 4, 2017. See more »


When Penny and Bernadette are chatting in the kitchen, the position of Penny's hands on her wine glass differs between angles. 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 The Muppet Show (1976) 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

Surprisingly realistic
1 May 2017 | by (Kalamazoo MI) – See all my reviews

TV Sitcoms have come a long way from when Lucy trying to get into Ricky's new show, or June burning the roast when Ward's Boss came for dinner could pass as typical American married life.

This episode presents Leonard and Penny with the kind of ambiguous problem that every marriage faces at least once a day. Leonard wants Penny to find a job she likes, but isn't sure she should be working for her old boyfriend. Penny thinks she would be great in this new job but doesn't want Leonard to be uncomfortable with her choice.

The writers deserve credit for finding a solution that was ambiguous as the problem. They also deserve credit for keeping the whole thing light and easy. There weren't really any guffaws, but a lot of smiles and reminders of my own married life.

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