Kate Beckett is a homicide detective in the NYPD. She asks Rick Castle to help her with the case of a copy-cat killer staging murders based on scenes from his novels, and is the inspiration for Rick's new novel character, Nikki Heat.

When we first meet Beckett, she is very straightforward, conservative, and cold; however she lightens up after spending time with Rick. She resigned from the NYPD after hiding important case information from Captain Gates with Detective Esposito.

Kate Beckett Quotes

Rick Castle: Checking you for bites and scratches. Just making sure you didn’t somehow get impregnated.
Kate Beckett: If you think that’s how I’d get pregnant we need to talk.

Castle: You're not alone in this. I'm here.
Beckett: I know.

Castle Quotes

Sometimes the hardest things in life are the things most worth doing.

Castle

Rick Castle: Checking you for bites and scratches. Just making sure you didn’t somehow get impregnated.
Kate Beckett: If you think that’s how I’d get pregnant we need to talk.