The Big Bang Theory Season 9 Episode 17 : The Celebration Experimentation

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Latest The Big Bang Theory Episodes

S12E24 : The Stockholm Syndrome

S12E23 : The Change Constant

S12E22 : The Maternal Conclusion

S12E21 : The Plagiarism Schism

S12E20 : The Decision Reverberation

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Summary

After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest (Adam West).

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