Sheldon: Hey, good news, Amy. We got the Athenaeum.
Amy: Oh, my gosh. That's amazing. How'd you get Barry to change his mind?
Sheldon: Well, I couldn't have done it without Leonard. Boy, you should've seen us in there. We were like Batman and Robin.
Leonard: Why do I have to be Robin?
Sheldon: If you have to ask, you're Robin.