Brian Thomas Smith credited as playing...
Zack Johnson
- Zack Johnson: [Upon learning that Leonard and Raj haven't considered the military applications of their new missile navigation system] You sure you guys are smart?
- Raj Koothrappali: So, uh, what are you guys talking about?
- Claire: Well, your friends were just telling me about all the other girls you're dating.
- Raj Koothrappali: Why would you do that? I specifically asked you not to do that!
- Penny Hofstadter: We didn't.
- Amy Farrah Fowler: *You* just did.
- Zack Johnson: Wow, maybe none of you guys are smart.
- Zack Johnson: I love science. Einstein, Steven Hawking, Mike deGrasse Tyson.
- Amy Farrah Fowler: Mike deGrasse Tyson?
- Howard Wolowitz: Yeah, you know. the boxer who grew a moustache and became a scientist.