A ninja will be coming after Castle (Nathan Fillion) and Beckett (Stana Katic) in an upcoming episode of Castle.

Beckett's Life Threatened With Gun Violence in Next Episode of Castle?

An upcoming episode of Castle is titled The Way of the Ninja, an episode that features the murder of a Japanese ballet dancer. Castle and Beckett discover that the dancer was killed by a ninja, who is then intent on going after them.

Teen Wolf actress Arden Cho is guest starring in the episode. She will be playing a character named Kiara, according to an official press release by ABC.

'70s Mobsters & Ninjas Coming Soon to Castle

In other Castle spoiler news, Katic recently revealed more details about the '70s-themed episode set to air later in season 6. Katic spoke to TVLine about the episode, which is aptly titled That '70s Show.

"In order to get information from one of our characters, we have to pretend that we're in that era - because he believes that he's still in that era," Katic explained. When asked if this would mean crazy wigs and outfits, she responded, "I don't know how extreme they're going to go. But they've been playing around with, like, different hair and stuff - for the guys, mostly."

As Enstars previously reported, Castle and Beckett will investigate a man named Harold Metzger, who was linked to '70s crime boss Vince Lamotta. Harold was previously described as "likable, funny and unbelievably charming."

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

Watch the promo for the next episode of Castle below:

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Castle, Television, ABC