These "Big Bang Theory" moments were big on tears. For this list, we’ll be looking at those moments of joy and happiness that had us all tearing up. Our countdown includes the final scene, Penny's box of memories, Sheldon's proposal, and more! Which of these moments had YOU wiping away the happiest of tears? Let us know in the comments!

Watch more great "TBBT" videos here:
Top 10 Times The Big Bang Theory Got Serious -    • Top 10 Times The Big Bang Theory Got ...  
Top 20 Saddest The Big Bang Theory Moments -    • Top 20 Saddest The Big Bang Theory Mo...  
Unscripted Moments That Were Kept in The Big Bang Theory -    • Unscripted Moments That Were Kept in ...  

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