Continuing from the season premiere episode, Beckett races against time to find a stolen toxin capable of killing tens of thousands of people. To make matters worse, Castle was exposed, leaving him with less than 24 hours to live.
Episode number: 6x2 Airdate: Monday September 30th, 2013
Beckett informs Castle that he only has less than a day to live. He asks about an antidote but she tells him that it was stolen with the poison. Beckett promises that they will find whoever took that antidote and that Castle can't get out of their engagement that easily. Castle tells her that before Jack died he mentioned Dreamworld which is a secret military base in the Middle East...