A Look-Back At Every Character In The Big Bang Theory. Who Is Your Favorite?

Aarti Mann as Priya Koothrappali

Another connection to Raj in the series, Aarti Mann who plays as Raj’s younger sister. Priya serves as the unintentional main antagonist of Penny-Leonard tandem. Aarti Mann also had roles on Heroes and Suits and has a degree in film writing and directing.

Aarti Mann As Priya Koothrappali

Sara Rue as Stephanie Barnett

In season two, Sara Rue appeared as Stephanie Barnett, a doctor and highly distinguished surgical resident who also once dated Leonard. Apart from her short stint in TBBT, Rue is also known for her roles in Popular, Less than Perfect, Rules of Engagement, and Bones. 

Sara Rue As Stephanie Barnett