The Big Bang Theory The Irish Pub Formulation (Season 4, Episode 6)
TV-PG
TV Episode | 25 min | Comedy, Romance

Primary photo for The Irish Pub Formulation

The Big Bang Theory

The Irish Pub Formulation (Season 4, Episode 6)

TV-PG

TV Episode | 25 min | Comedy, Romance

Leonard tries to keep everyone from finding out that he spent the night with Raj's sister, but Sheldon finds out and concocts an elaborate story to help him keep the secret from Raj.

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Cast	+ Add Cast
6 cast members

Name	Known for
Johnny Galecki Leonard Hofstadter Leonard Hofstadter See fewer	The Big Bang Theory (2007)
Jim Parsons Sheldon Cooper Sheldon Cooper See fewer	The Big Bang Theory (2007)
Kaley Cuoco Penny (credit only) Penny (credit only) See fewer	The Big Bang Theory (2007)
Simon Helberg Howard Wolowitz Howard Wolowitz See fewer	Florence Foster Jenkins (2016)
Kunal Nayyar Raj Koothrappali Raj Koothrappali See fewer	The Big Bang Theory (2007)
Aarti Mann Priya Koothrappali Priya Koothrappali See fewer	The Recruit (2022)