Episode Titles: Irish
You are viewing a list of 1 The Big Bang Theory episode featuring "Irish" in their title.
Season 4, Episode 6 - The Irish Pub Formulation
Aired October 28, 2010
Raj's sister Priya is in town and soon rekindles a past secret relationship with Leonard. Leonard keeps his new affair a secret from the rest of the gang, but Sheldon finds out about the relationship and helps Leonard by developing an elaborate lie.