Family Guy - The Big Bang Theory

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Family Guy - Season 9 - Episode 163 - The Big Bang Theory

Watch Family Guy - The Big Bang Theory online

About this Family Guy episode:

Family Guy - The Big Bang Theory is the 16th episode of the Family Guy Season 9.

In this Family Guy episode, Stewie and Brian go back in time to stop Bertram from killing Leonardo da Vinci in order to erase Stewie from the universe.