Watch The Big Bang Theory Season 8 Episode 21 online to find out what happens when Leonard and Raj work on a project for NASA, and Penny goes to Sheldon for advice.

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Be sure to watch The Big Bang Theory Season 8 Episode 21 online right here via TV Fanatic to join in on all the laughs with Sheldon, Leonard, and the rest of the gang.

Not only does this episode offer the opportunity to hear Sheldon's new renditions of children's songs as ways to teach science, but it also offers new pairings and important decisions for our favorite characters.

When Raj is approached by NASA to work on a new project, he asks the guys for help. He and Leonard end up working on the project together, but they have a tough time getting started. Why? And will they be successful? Watch The Big Bang Theory Season 8 Episode 21 online right now to see for yourself.

Meanwhile, Penny is still considering whether or not to move forward in her acting career, and she goes to Sheldon for advice. So what advice does he give her, and does she make the right decision? It turns out, she also learns something about herself in the process.

What are you waiting for? Watch The Big Bang Theory Season 8 Episode 21 online right here via TV Fanatic! We offer many different ways to watch.

Episode Details

On The Big Bang Theory Season 8 Episode 21, when Raj is asked by NASA to craft a message for the extraterrestrials the guys battle over what it should be.


Rating: 3.2 / 5.0 (62 Votes)
Show:
The Big Bang Theory
Season:
Episode Number:
21

The Big Bang Theory Season 8 Episode 21 Quotes

Sheldon: [singing] The itsy bitsy spider is not an insect at all. Because it has eight legs and two body parts.
Leonard: That’s pretty cool, Sheldon.
Sheldon: Thank you. Do either of you know Beyonce? I’d love her to get behind it.

Just this morning, Sheldon wouldn't let me put almond milk in my Grape Nuts because he said it was a theoretical nut conflict.

Leonard