The Big Bang Theory: Season 9, Episode 17

The Celebration Experimentation

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

Writing:
  • Chuck Lorre
  • Bill Prady
  • Adam Faberman

Stars:
Release Date: 2007-09-24
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12
Metacritic: 8.0/10
TMDb: 7.9/10
  • Country: US
  • Language: English
  • Runtime: 22

Other episodes for this season

The Matrimonial Momentum
Episode 1 - The Matrimonial Momentum
The Separation Oscillation
Episode 2 - The Separation Oscillatio...
The Bachelor Party Corrosion
Episode 3 - The Bachelor Party Corros...
The 2003 Approximation
Episode 4 - The 2003 Approximation
The Perspiration Implementation
Episode 5 - The Perspiration Implemen...
The Helium Insufficiency
Episode 6 - The Helium Insufficiency
The Spock Resonance
Episode 7 - The Spock Resonance
The Mystery Date Observation
Episode 8 - The Mystery Date Observat...
The Platonic Permutation
Episode 9 - The Platonic Permutation
The Earworm Reverberation
Episode 10 - The Earworm Reverberation
The Opening Night Excitation
Episode 11 - The Opening Night Excitat...
The Sales Call Sublimation
Episode 12 - The Sales Call Sublimatio...
The Empathy Optimization
Episode 13 - The Empathy Optimization
The Meemaw Materialization
Episode 14 - The Meemaw Materializatio...
The Valentino Submergence
Episode 15 - The Valentino Submergence
The Positive Negative Reaction
Episode 16 - The Positive Negative Rea...
The Celebration Experimentation
Episode 17 - The Celebration Experimentation
The Application Deterioration
Episode 18 - The Application Deteriora...
The Solder Excursion Diversion
Episode 19 - The Solder Excursion Dive...
The Big Bear Precipitation
Episode 20 - The Big Bear Precipitatio...
The Viewing Party Combustion
Episode 21 - The Viewing Party Combust...
The Fermentation Bifurcation
Episode 22 - The Fermentation Bifurcat...
The Line Substitution Solution
Episode 23 - The Line Substitution Sol...
The Convergence Convergence
Episode 24 - The Convergence Convergen...