1. Pilot - TV-14 (Original rating)/TV-PG-DL (Current rating) - One masturbation reference isn't a TV-14.

2. The Big Bran Hypothesis - TV-PG-DL

3. The Fuzzy Boots Corollary - TV-PG-DL

4. The Luminous Fish Effect - TV-PG-DL - Jokes about periods aren't enough to get a TV-14.

5. The Hamburger Postulate - TV-PG-D

6. The Middle Earth Paradigm - TV-PG-DS

7. The Dumpling Paradox - TV-PG-DL - The guys playing Halo doesn't get a V, since actual gameplay is not shown.

8. The Grasshopper Experiment - TV-PG - Sperm count and testicles being mentioned isn't enough for a D.

9. The Cooper-Hofstadter Polarization - TV-PG-D

10. The Loobenfeld Decay - TV-PG-D - A D for the line "You're quark-blocking us".

11. The Pancake Batter Anomaly - TV-PG-L

12. The Jerusalem Duality - TV-PG

13. The Bat Jar Conjecture - TV-PG

14. The Nerdvana Annihilation - TV-PG

15. The Pork Chop Indeterminacy - TV-PG-L

16. The Peanut Reaction - TV-PG-L

17. The Tangerine Factor - TV-PG-DL

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