Sheldon: So what prescription are you getting filled?
Leonard: Sheldon!
Sheldon: No wait, I want to guess. Don't tell me.
Professor Proton: I wasn't going to tell you.

Sheldon: Arthur! Arthur, it's me, Sheldon Cooper.
Professor Proton: Trust me, I remember.
Sheldon: This is television legend, Arthur Jeffries. His science show inspired millions of children.
Professor Proton: Hold on, you have a girlfriend?
Amy: Yes, and I've heard so much about you. Hey look, we're wearing the orthopaedic shoes. I can't believe I dress like a celebrity.
Professor Proton: Okay, I get it now.

Professor Proton: I'm having trouble with my pacemaker.
Leonard: I'll call for help.
Penny: Any chance we could plug it into the potato?
Professor Proton: No.

Professor Proton: Just, just call me Arthur.
Sheldon: Leonard, did you hear that? Professor Proton said I should call him Arthur. That means we're friends. Professor Proton: No, a friend would've told me about the elevator.

Professor Proton: I power a clock with a potato.
Penny: Shut up! You can do that? I mean ... wouldn't that solve the world's energy crisis?
Professor Proton: No.