Episode Titles: Celebration

 You are viewing a list of 2 The Big Bang Theory episodes featuring "Celebration" in their title.

  • The Celebration Experimentation

    The Celebration Experimentation
    Season 9, Episode 17 - Aired February 25, 2016

    After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest, on the 200th episode of The Big Bang Theory.

  • The Celebration Reverberation

    The Celebration Reverberation
    Season 11, Episode 11 - Aired December 14, 2017

    As Sheldon plans a birthday celebration for Amy, Howard is looking forward to Halley's first birthday. Meanwhile, Leonard has the holiday blues when he receives a Christmas letter from his brother detailing his many accomplishments.