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World famous mystery writer Richard Castle finds unexpected inspiration when Detective Kate Beckett questions him about a series of murders that based on his books.
The lead detective on Beckett's mom's murder cases resurfaces this week. A subsequent investigation leads back to a decades-old conspiracy.
Carrie Genzel guest stars on this episode of Castle. She portrays a former model and the wife of a billionaire. Gilles Marini also plays a key role.
Laura Prepon shows up on this special episode of Castle. It focuses on Castle's book and the actress that will help bring it to the big screen.
A body is found floating in the East River on this episode, which leads Castle and Beckett into old tunnels and passageways of New York City. Once there, the partners find a secret from the days of Prohibition.
An astrophysicist is found dead this week, leading to a case that keeps pointing back to the impossible: alien abduction. Lyle Lovett guest stars.
A subway worker is found dead shot to death this week. While working this case, Castle and Beckett uncover the violet abduction of a young boy and must unravel the motives behind this kidnapping.
Beckett and Castle respond to an "officer down" call this week and are in for a surprise: the victim is actually a male stripper dressed as a cop. Hot stuff!
Is the Tripler Killer back after a four year hiatus? It seems that way this week, as Castle and Beckett play a dangerous game of wits with the murderer.
Pallbearers lose control of a casket this week, causing an extra body to somehow tumble out. Rick and Castle must then look into the murder of a doctor, while Gina bonds with Alexis.
Castle and Beckett look into the murder of a young mathematician this week. He was murdered with a 200-year-old bullet, which leads to thoughts of a time-traveling culprit.