The Big Bang Theory/The Celebration Experimentation

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The Celebration Experimentation
Season 9, Episode 17
Airdate February 25, 2016
Production Number 4X7217 / T12.15217
Teleplay by Steven Molaro &
Steve Holland &
Tara Hernandez
Story by Chuck Lorre &
Eric Kaplan &
Jeremy Howe
Directed by Mark Cendrowski
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The Celebration Experimentation is the seventeenth episode of the ninth season of The Big Bang Theory, and the two hundredth episode overall.

Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco (Penny Hofstadter), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz), Kevin Sussman (Stuart Bloom)

Special Guest Star: Christine Baranski (Beverly), Sara Gilbert (Leslie Winkle)

Special Appearance by: Wil Wheaton (Himself), Adam West (Himself), Stephen Hawking (Himself)

Guest Starring: John Ross Bowie (Barry Kripke)


Plot Overview


Arc Advancement





The Show

Behind the Scenes

Allusions and References

Memorable Moments