Sheldon receives a message from his best friend in high school, Tam Nguyen, that he is coming to California to show his son around Cal Tech. Sheldon's closest group of friends wonder why Sheldon has never mentioned Tam before. The reason?: Sheldon and Tam have not spoken in twenty years since Tam is now on Sheldon's enemies list, because, according to the list, Tam "knows what he did". As such, Sheldon has no intention of meeting with Tam. While whatever the issue, Leonard, Howard and Raj believe that the reason will be nothing material to any normal person and thus without even knowing what it is, already side with Tam. After going through several channels without finding out the reason, Leonard, Howard and Raj do locate Tam on campus to find out directly from him, Tam who doesn't divulge why for a very good reason. They eventually do learn the reason from Sheldon, all his friends who try to bridge the gap from Sheldon back to Tam. Meanwhile, Penny and Bernadette decide to do some ...
Did You Know?
This episode was taped on September 18, 2018. See more
Howard, today is your lucky day. Leonard's out, you're my new best friend. Well, I'm not thrilled about it, either, but here we are. Okay, fine. Is Bernadette there? Sh... no. Just Stuart? Let me call you back.
Amy Farrah Fowler
[he hangs up
Let me guess. This thing with Tam escalated, and now you're mad at Leonard and looking for a new best friend?
You know me so well. It's too bad you can't be my best friend.
Amy Farrah Fowler
I can be.
Oh, you can't be my wife and my best friend. Who would I complain about you to?
References Sesame Street
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