Season 9 · Episode 17 · Overall #200
The Celebration Experimentation
Aired February 25, 2016 Directed by Mark Cendrowski Written by Story by : Chuck Lorre & Eric Kaplan & Jeremy Howe | Teleplay by : Steven Molaro & Steve Holland & Tara Hernandez
About This Episode
Sheldon celebrates his birthday for the first time and the party is an exercise in controlled chaos. Amy orchestrates the milestone.
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