After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest (Adam West). This episode marks the series 200th episode!.

Episode Viewers and Ratings

Season 9 Episode 17 of The Big Bang Theory was watched by 15,940,000 viewers, resulting in a 3.80 rating in the 18-49 demographic.

Is The Big Bang Theory Renewed or Cancelled for Season 10?

The Big Bang Theory Season 9 Episodes...

• s09e01 - The Matrimonial Momentum
• s09e02 - The Separation Oscillation
• s09e03 - The Bachelor Party Corrosion
• s09e04 - The 2003 Approximation
• s09e05 - The Perspiration Implementation
• s09e06 - The Helium Insufficiency
• s09e07 - The Spock Resonance
• s09e08 - The Mystery Date Observation
• s09e09 - The Platonic Permutation
• s09e10 - The Earworm Reverberation
• s09e11 - The Opening Night Excitation
• s09e12 - The Sales Call Sublimation
• s09e13 - The Empathy Optimization
• s09e14 - The Meemaw Materialization
• s09e15 - The Valentino Submergence
• s09e16 - The Positive Negative Reaction
• s09e17 - The Celebration Experimentation
• s09e18 - The Application Deterioration
• s09e19 - The Solder Excursion Diversion
• s09e20 - The Big Bear Precipitation
• s09e21 - The Viewing Party Combustion
• s09e22 - The Fermentation Bifurcation
• s09e23 - The Line Substitution Solution
• s09e24 - The Convergence Convergence

The Big Bang Theory Show Summary

The Big Bang Theory is a comedy series about four young scientists who know all about the world of physics, and one girl, who gives the physics world a real spin.

Leonard Hofstadter is a smart guy who tries his best to complete his research and become famous for his work while also attempting to be the most socially-interacting guy in their friend group. Sheldon Cooper is one of the world's smartest men with an intellectual capacity through the roof and a language with scientific words normal people only have one comment to ('What-). Howard Wolowitz is an engineer with his mind partially on science, but mostly on women. He always tries his best to impress a girl and get his share of sexual intercourses, but he always manages to screw up somehow, probably with his bad knowledge of treating women in a bad matter. Rajesh Koothrappali is an Indian scientist performing experiments on black holes, outer space, life on other planets and not to mention string theory. Raj is mostly known for his Selective Mutism, in other words, his fear of speaking to women, making social interaction difficult for him. Finally, there's Penny.

Penny is the gorgeous girl next-door to Leonard and Sheldon's apartment, and though she does not have any knowledge in physics or science, she makes success by being a funny character frequently having hilarious comments and on- and off-going relationships.