<Li> Detective Sean Raley is based on Detective Ryan, and is coined "King of All Surveillance Media" by Det . Heat . While working with Ochoa, their nickname is "Roach". After Det . Heat's promotion to captain, she names Raley and Ochoa co-lead detectives of the 20th Detective Squad . </Li> <Li> Dr. Lauren Parry is a medical examiner with the Office of Chief Medical Examiner of the City of New York and one of Det . Heat's closest friends, based on Dr. Lanie Parish . </Li> <Li> Margaret Rook is Jameson Rook's mother, based on Richard Castle's own mother Martha Rodgers . Margaret is a 60 - something - year - old Tony Award - winning Broadway diva . </Li> <Li> Detective Randall "Randy" Feller is a member of the NYPD Taxi Squad in Heat Rises . He transferred to Det . Heat's homicide team before the events of Frozen Heat . </Li>

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