Guest Star: Erin Allin O'Reilly
You are viewing a list of Erin Allin O'Reilly's 2 appearances on The Big Bang Theory.
The Middle-Earth Paradigm
Season 1, Episode 6 - Aired October 29, 2007The whole gang attends Penny's Halloween party, where Leonard's feelings for Penny come to the fore after her ex-boyfriend Kurt shows up. Leonard's attempts to impress Penny by standing up to Kurt lead to humiliation.
Appeared as Cheryl
The Pancake Batter Anomaly
Season 1, Episode 11 - Aired March 31, 2008When Sheldon catches the flu, Leonard flees the apartment to avoid having to care for a needy Sheldon. After Sheldon turns up at the Cheesecake Factory, Penny is left to care of him.
Appeared as Cheryl