Guest Star: Steven Yeun

You are viewing a list of Steven Yeun's 1 appearance on The Big Bang Theory.

  • The Staircase Implementation

    Season 3, Episode 22 - The Staircase Implementation
    Aired May 17, 2010

    After a disagreement with Sheldon, Leonard tells Penny the story of how he moved into the apartment building, became friends with Sheldon, and how the elevator was broken.

    Appeared as Sebastian

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