Myko Olivier

Beckett races to find a stolen toxin capable of killing thousands of people and Castle has less than 24 hours to live after being exposed to the chemical weapon.

When a rising young pop star is found dead in an alley, Castle and Beckett delve into the victim's out-of-control hard-partying lifestyle, but as they dig deeper, a shocking revelation is unearthed.

Beckett and Castle face the consequences of their decisions during a high-stakes investigation.

Castle and the boys, along with a new NYPD detective, Sullivan, investigate the murder of a former child star. The case takes a turn for the worse when Beckett and McCord arrive.

As Castle and Beckett investigate the ritualistic murder of a young woman, they find strange symbols in the victim's flat; Castle struggles with Alexis' decision to move in with Pi.

A grisly murder investigation leads Castle and Beckett to a suspect who claims he's travelled back in time to stop terrible events from unfolding.