SEZON: 4
ÖZET
Part one of two. The team investigates an enigmatic killer who does not appear to officially exist. Castle and Beckett try to probe further, but unexpectedly cross paths with CIA operative Sophia Turner - an old friend of Castle's who also served as the inspiration for one of his characters. She reveals their suspect is linked to an international conspiracy that could have devastating consequences for America. Guest starring Jennifer Beals (Flashdance, The Chicago Code).