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The Big Bang Theory: Season 9

9x17 The Celebration Experimentation
TV-14

Episode

IMDB TMDB

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Aired2016-02-26T01:00:00Z on CBS
Runtime19m
DirectorMark Cendrowski

WritersJeremy Howe (story) + 5 more, Tara Hernandez (teleplay), Chuck Lorre (story), Steve Holland (teleplay), Eric Kaplan (story), Steven Molaro (teleplay)
CountryUnited States
LanguagesEnglish
GenresComedy

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

Private Notes

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
7

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The Big Bang Theory: Season 9

9x17 The Celebration Experimentation
TV-14

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
7

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Penny

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Amy Farrah Fowler

Kevin Sussman

Stuart Bloom

Sara Gilbert

Leslie Winkle

John Ross Bowie

Barry Kripke

Adam West

Self

Wil Wheaton

Wil Wheaton

Stephen Hawking

Stephen Hawking

Christine Baranski

Beverly Hofstadter

Find a TV show or movie

The Big Bang Theory: Season 9

9x17 The Celebration ExperimentationTV-14

ActorsAll Cast & Crew

Season Regulars 7

Guest Stars 7

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Penny

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Amy Farrah Fowler

Kevin Sussman

Stuart Bloom

Sara Gilbert

Leslie Winkle

John Ross Bowie

Barry Kripke

Adam West

Self

Wil Wheaton

Wil Wheaton

Stephen Hawking

Stephen Hawking

Christine Baranski

Beverly Hofstadter

Find a TV show or movie

9x17 The Celebration Experimentation
TV-14

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
7