They say everybody has a twin out there, and Lanie finds hers dead on "Castle" in the Monday, Nov. 18 episode titled "Disciple."
In the exclusive sneak peek above, Lanie, Castle and Beckett find meet the murder victim, Pam, who is in no way related to Lanie. "I was shook up at first, but I'm fine now," Lanie tells Beckett and Castle.
Pam's death isn't a typical hanging, her neck wasn't broken, she was strangled to death by a fishing line.
The official description: "Castle and Beckett arrive at a crime scene to discover that the female victim bears a shocking resemblance to Medical Examiner Lanie Parish. As the team tries to make sense of this mystery, they realize the killer may be targeting detectives of the 12th Precinct. Annie Wersching ('24') guest stars as Dr. Kelly Nieman, an exclusive Manhattan cosmetic surgeon who draws Castle and Beckett's interest because of her connection to the victim, on 'Castle,' MONDAY, NOVEMBER 18 (10:01-11:00 p.m., ET) on the ABC Television Network."
"Castle" airs Mondays, 10 p.m. EST on ABC.