On tonight’s “Castle” season 6 episode 4 “Number One Fan,” a desperate young murder suspect, Emma Briggs (guest star Alicia Lagano) takes hostages at gunpoint then mysteriously insists that she will only negotiate with one person: Richard Castle. Billy Miller also guest stars as Mickey Gerhardt, a hot headed Wall Street banker who gets caught in the hostage situation.
The series is based on mystery-thriller writer Richard Castle (Nathan Fillion), who is called in to help investigate a series of copycat murders based on his books. After completing the job, he finds that he enjoys the experience enough to continue it. Pulling strings, he arranges to accompany NYPD Detective Kate Beckett (Stana Katic), claiming he wants to study and use her as a personality basis for his next book series. Once that initial case was solved, Castle and Beckett continued to investigate strange homicides in New York, combining Castle’s writer intuition and Beckett’s creative detective work. Over the past four seasons, Castle and Beckett’s relationship has grown even stronger as they’ve dodged bullets, captured killers, and solved countless murder cases with their unorthodox partnership.
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“Castle” season 6, episode 4 “Number One Fan,” airs October 14, 10:00 p.m. ET on ABC. Spoiler videos below: