A chef from an exclusive new restaurant is found murdered. The investigation leads Beckett to reunite with a friend from high school, who sets her sites on Castle to Beckett's dismay. Meanwhile, detective Denning is still sweet on Beckett, a fact which is troubling to Castle.
Episode number: 2x22 Production Number: 222 Airdate: Monday May 03rd, 2010
It is true that liquid nitrogen can freeze flesh so solidly that it will shatter. However, it would take a lot more than would have been available in the kitchen to freeze a human body solidly, and would require full immersion for a period of time.