The next episode of Castle features Castle (Nathan Fillion) and Beckett (Stana Katic) tracking down a suspected ninja.

Beckett To Face Off Against Mother's Murderer?

ABC recently released two new sneak peeks for the upcoming episode of Castle, titled The Way of the Ninja. The sneak peeks both feature Castle and Beckett at odds with each other over the idea that the latest murder suspect could actually be a ninja.

The first sneak peek, posted by TVLine, features Castle and Beckett at the scene of the crime discovering what may be the murder weapon. Castle finds a knife whose hilt corresponds with the bruises found on the victim, Japanese ballet dancer Jade Yamata. A door closes suddenly, causing Beckett to investigate elsewhere.

Richard & Beckett Involved In U.S. Attorney Investigation?

It is then that a mysterious hooded figure appears suddenly in front of Castle and promptly takes the knife out of his hand. Castle tries to explain what just happened to Beckett, who remains skeptical.

In the other sneak peek clip, posted by TV Guide, Castle and Beckett are shown explaining the crime to Captain Gates (Penny Johnson Jerald). Castle is convinced that Jade's killer is definitely a ninja, but Beckett isn't so sure.

"Or he is just an athletic person with a hooded track suit," Beckett says in response to Castle's claim. A consulate officer then comes in and reveals what may be a troubled relationship between Jade and her parents. Could this have something to do with Jade's murder?

Castle season 6 airs Mondays at 10 p.m. on ABC.

Watch the sneak peeks for the next episode of Castle below: