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CASTLE - 'Resurrection' - When clues in a murder implicate Castle and Beckett's nemesis, Dr. Kelly Nieman (guest star Annie Wersching), Castle is called in to consult on the case. But as the team delves deeper into the investigation, they uncover connections to notorious serial killer Jerry Tyson (guest star Michael Mosley), on Part 1 of 'Castle,' MONDAY, FEBRUARY 9 (10:01-11:00 p.m., ET) on the ABC Television Network. (Photo by Richard Cartwright/ABC via Getty Images)

CASTLE - 'Resurrection' - When clues in a murder implicate Castle and Beckett's nemesis, Dr. Kelly Nieman (guest star Annie Wersching), Castle is called in to consult on the case. But as the team delves deeper into the investigation, they uncover connections to notorious serial killer Jerry Tyson (guest star Michael Mosley), on Part 1 of 'Castle,' MONDAY, FEBRUARY 9 (10:01-11:00 p.m., ET) on the ABC Television Network. (Photo by Richard Cartwright/ABC via Getty Images)