Corporate spy done in on Jan. 9 episode of "Castle"

The episode of Castle on 9 Jan 2012 titled "Till Death Do Us Part." involved the death of a corporate spy at the hands of a female COO who had been seduced by the spy (the word "sexpionage" appears in the episode a few times). The death was by poisoning with colchicine, placed in a protein drink. [The use of colchicine in the US goes back to the time of Benjamin Franklin.]

The COO viewed the murder as just business. Life is tough when trade secrets are stolen.