Here's the bad news, Castle Fanatics: you need to wait an extra week for Castle Season 6 Episode 18 to air.

But here's the good news: it will involve ninjas!!!

Maybe. Possibly. According to Rick, at least.

Indeed, based on the following promo and the following set of photos, it looks like one of Rick's crazy theories will soon come to life - but if Beckett doesn't see these costumed warriors for herself, will she believe him?

When a Japanese ballet dancer is murdered on the March 18th episode, the investigation leads Castle and Beckett to what appear to be ninjas. Will Rick be thrilled, terrified or both? And how long will it take for this plot twist to end up in one of his books?

Click through pictures from the upcoming installment now:

Castle Photos from "The Way of the Ninja"

Start Gallery

With no new episode airs this Monday, you can watch Castle online in order to catch up and you can check out the official teaser below for The Way of the NInja."

C. Orlando was a TV Fanatic Staff Writer. Follow her on Twitter.