Zoe Perry credited as playing...
Mary Cooper
- Missy: Maybe he'll learn to act normal.
- Mary Cooper: Maybe you should learn to act nice.
- Missy: You people don't get my sense of humor.
- Sheldon: [narrating] The science fair may be a competition, but when the goal is promoting knowledge, we're all winners.
- Principal Petersen: And the winner of the Medford High School Science Fair is... Sue Ann Ludlow!
- Sheldon: [loudly] You've got to be kidding me!
- Mary Cooper: Shelly!
- Sheldon: [yelling] You people are crazy!
- George Sr.: [sotto voce, while picking up Sheldon and carrying him out of the science fair] All right...
- Sheldon: You're celebrating mediocrity! Mediocrity! MEDIOCRITY!