Kate Beckett - Partnership With Castle

Partnership With Castle

Beckett is a detective with the Twelfth Precinct Homicide Squad of the New York City Police Department, where she worked with fellow detectives Javier Esposito and Kevin Ryan and medical examiner Lanie Parish under Captain Roy Montgomery until he was killed at the end of season 3. In season 4, Montgomery is replaced by Victoria "Iron" Gates. In the pilot episode, Beckett leads the investigation into the murder of Allison Tisdale, which is staged in the style of a death scene described in the Richard Castle novel Flowers For Your Grave, along with other murders based on Castle's fiction.

Beckett is forced to have Castle consult on the case, and though she tries to contain his access, he repeatedly violates police protocol. Although the killer is apparently caught when he leaves his fingerprints on a note he allegedly sent to Castle, Castle convinces Beckett to continue the investigation based on a hunch, the two discovering that the killer was actually Allison's brother, setting up a mentally ill client of his sister—a social worker—so that he could claim the majority of their father's estate due to his father suffering from terminal cancer. By the end of the pilot, Castle uses his friendship with the Mayor to get partnered with Beckett under the pretense of conducting research for a new series of novels starring a detective based on Beckett. Toward the end of the fourth episode, Beckett's literary alter-ego is revealed to be named "Nikki Heat," much to Beckett's annoyance.

Since the explosive season 4 finale, The crime duo have been dating till Castle popped the question in the season 5 finale when Kate has been offered a job in DC to work for the Attorney General's office.