The Vengeance Formulation

The Big Bang Theory"The Vengeance Formulation"
Season 3
Number 9
Episode information
Written by	Mark Cendrowski
Original air date	November 23, 2009
The Big Bang Theory Episodes
Previous	"The Adhesive Duck Deficiency"
Next	"The Gorilla Experiment"

"The Vengeance Formulation" is the ninth episode of the third season of the American sitcom The Big Bang Theory. This episode first aired on Monday, November 23, 2009.