Castle (2009)

S6E3 Need to Know

While Beckett is still in D.C., Castle and his team dive into the murder of former child actor Charlie Reynolds, known for his role as the quirky nerd on a popular 90s high school sitcom. The investigation gets complicated when Agents Beckett and McCord arrive from Washington to take charge, sparking rivalry within the precinct. The question lingers: what makes the death of a faded star worthy of federal attention? Beckett and McCord remain tight-lipped about it. Meanwhile, Castle has to navigate the dynamics of the precinct with the arrival of NYPD Detective Frank "Sully" Sullivan.