Vote for your favorite The Big Bang Theory episodes in our tournament

Guest Star: Kal Penn

Kal Penn is an American actor best known for his roles on the TV shows House and Designated Survivor, and for the film series Harold & Kumar.

You are viewing a list of Kal Penn's 3 appearances on The Big Bang Theory.

  • The Confirmation Polarization

    The Confirmation Polarization
    Season 12, Episode 13 - Aired January 17, 2019

    Sheldon and Amy are delighted when a pair of physicists from Chicago prove their theory on super-asymmetry, until they try to take credit for the work.

    Appeared as Dr. Campbell

  • The Laureate Accumulation

    The Laureate Accumulation
    Season 12, Episode 18 - Aired April 4, 2019

    Sheldon and Amy are outraged when they see Drs. Pemberton and Campbell going on a publicity tour, taking credit for their theory.

    Appeared as Dr. Campbell

  • The Big Bang Theory

    The Plagiarism Schism
    Season 12, Episode 21 - Aired May 2, 2019

    President Siebert tries to patch things up between Drs. Pemberton and Campbell.

    Appeared as Dr. Campbell

 Search for Kal Penn on IMDB