To improve his skills as an instructor, Sheldon asks Penny to give him acting lessons. Meanwhile, Raj begins having impure fantasies about Bernadette.



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Raj laments the fact of his single status. An admission by Bernadette totally preoccupies Raj's thoughts in his fragile state. Meanwhile, Sheldon has just conducted a guest lecture to the university's brightest doctoral candidates. He believes the lecture was an overwhelming success, but messages posted on various social networking sites show that Sheldon's perception and reality are polar opposites. A less than happy Sheldon decides to take some advice from Amy. As teaching is a performance art, she suggests that he take acting lessons. Despite or in part because he thinks she an acting failure, Sheldon asks Penny to be his teacher, his thoughts along the lines of the old adage, "those who can't do, teach". As Penny and Sheldon go through their antagonistic teacher/student relationship, Penny manages to get through to Sheldon in a way she couldn't have even imagined. Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


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Release Date:

3 February 2011 (USA)  »

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Aspect Ratio:

16:9 HD
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Did You Know?


The title refers to the fact that Sheldon is taking acting lessons from Penny to improve his teaching skills. See more »


Sheldon often boasts that he has an eidetic memory and never forgets a single thing. However, when acting the scene between Mr. Spock and his own mother, Sheldon has to read out lines from a paper-based script which he adapted from his own play the night before. He shouldn't need the script. See more »


[Sheldon is acting out a scene from a play he wrote]
Sheldon Cooper: [as a child] Mommy, why are you crying?
Sheldon Cooper: [as his mother] Because I'm gonna miss you, Shellybean, even though you creep the bejesus out of me.
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Crazy Credits


In the near future, we will see brain scan technology that can determine, without fail, if someone is telling the truth. Shortly thereafter, we will be able to buy mobile devices that perform the same task on the fly. In other words, we are on the verge of having all of our conversations constantly and instantly monitored for veracity. This would then spawn a counter-technology comprised of personal mind shields that keep oneself from being scanned (the use of which would, of course, imply that one is keeping secrets). The end result? Universal honesty, initially as a result of the duress of surveillance, will become the norm. Then, over time, this mode of thinking, communicating and behaving will become second nature. This will usher in the dawn of a new civilization. After thousands of years of human suffering, world peace and the long-fabled 'good will towards all men' will have finally arrived. The end of lying and cheating will also mark the end of scripted entertainment. So, you know, there'll be a downside. See more »


References Star Trek (1966) See more »


Big Bang Theory Theme
Composed and Performed by Barenaked Ladies
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User Reviews

"The Thespian Catalyst" is another great ep of "The Big Bang Theory"
10 October 2011 | by (Baton Rouge, La.) – See all my reviews

In this last season ep of "The Big Bang Theory": After being told what a boring lecture he did for college students, Sheldon asks Penny help for acting lessons. Penny reluctantly agrees for $40. Her methods don't work so they do a "Star Trek" one-act play which Sheldon had written at age 10. Penny is Spock while Sheldon does his mom. Meanwhile, after Howard says out loud that Raj needs a woman, Bernadette tells Raj he's a hottie. That sets Raj to dreaming about her...This was another hilarious ep of "The Big Bang Theory" especially whenever the obvious dreams of Raj comes up (you know it's so because he's sober and talking to women). And Melissa Rauch really does hold her own in these sequences as a funny and sexy presence. And dig Penny and Sheldon's scenes of role playing especially when Sheldon does both his mother and himself when underage. And, like Leonard, I do wonder why the Sci-Fi channel had to change to SyFy...

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