Georgie: Yeah, sure, I remember Tam, Sheldon's little Vietnam buddy. The two of them were always running around together.
Leonard: So, what happened?
Georgie: What do you mean?
Leonard: Well, I mean, Sheldon never talks about him. They haven't spoken in years. He wasn't at the wedding.
Georgie: He wasn't? All right, well, this is embarrassing, 'cause I had a long conversation with someone who I thought was Tam.

Amy: I tried to ask him about it, and he invoked section three, article five of the marriage contract: beeswax, none of your.

Bernadette: Look, I think that's LeBron over there.
Penny: James?
Bernadette: No, LeBron Kershenbaum.

Amy: Hey, did you guys know that Sheldon had a best friend growing up named Tam?
Leonard: Was that the imaginary talking koala?
Amy: No. He's a real person who apparently betrayed him.
Leonard: Yeah, so did the koala.