 As Sydney learns that Vaughn is under investigation for being a double agent, Jack and Irina forge an unlikely partnership in their attempt to get their daughter out to the CIA for good. When Kendall learns that Sark and Sloan are attempting to get their hands on a Rimbaldi manuscript detailing the works of the human heart, he sends Jack and Irina to Bangkok to learn more, and then to Pannama to capture Sloan. But Irina betrays Jack and escapes from custody... this time for real.