6.6
/10
Kathy O'Brien is a fictional character portrayed by Emily Happe in the TV series The Big Bang Theory.
They appear in 1 episodes out of a total of 279 aired

Kathy O'Brien

by Emily Happe

character

Episodes1

  • 8.2
    /10

    The Cooper-Nowitzki Theorem
    episode S2.E6 november 2008
    Sheldon is flattered when a graduate student takes a shine to him, however her extreme devotion becomes too much to handle.