Fan Casting Captain Katherine Beckett Castle in Scales: Mermaids are Real - A Tail of Crime in New York (2015)

She is an NYPD Captain in charge of the 12th Precinct, after being promoted from homicide detective, and a former Federal government agent. Beckett is now the wife of Richard Castle, a novelist and consultant with the precinct. She is in charge of the investigation into Gary Witts and his mermaid hunting activity.