Caskett fans were frightened by the sight of another woman locking lips with their favorite author this week - review HERE - but this ABC hit will tackle an even scarier topic on October 24:

Ghosts!!!

Indeed, the Castle episode "Demons" will find Castle and Beckett looking into the murder of a well-known ghost hunter who was killed while investigating paranormal activity at a famous mansion. As you might expect, Castle gets awfully excited by the case, wondering if the supernatural is actually involved. Beckett? Not so much. View the official preview now: