Man, nerds get all the best guests! Welcome to MsMojo, and today we’re counting down our picks for the guest stars and celebrity cameos that made the biggest bang on “The Big Bang Theory”. Our countdown includes cameos by Adam West, Katee Sackhoff, Mark Hamill and more! Do you have a favorite “Big Bang” cameo? Let us know in the comments.

Check out these other "Big Bang Theory" videos:
Top 10 Underrated Friendship Moments on The Big Bang Theory:    • Top 10 Underrated Friendship Moments ...  
Top 20 The Big Bang Theory Moments That Made Us Happy Cry:    • Top 20 The Big Bang Theory Moments Th...  
Top 20 Times The Big Bang Theory Tackled Serious Issues:    • Top 20 Times The Big Bang Theory Tack...  

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