Castle (Nathan Fillion) and Beckett (Stana Katic) will be going up against some pretty big enemies in the next three episode of Castle, including but not limited to ninjas, a U.S. Attorney and '70s mobsters.

Beckett To Face Off Against Mother's Murderer?

The next episode of Castle, which is set to air after the premiere of Dancing With the Stars on March 17, is titled The Way of the Ninja. This episode features Castle and Beckett investigating the secret life of a Japanese ballet dancer who is mysteriously murdered. They discover that the ballet dancer was killed by a ninja - who then makes Castle and Beckett his next target.

After The Way of the Ninja, there will be an episode called The Greater Good, set to air on Monday, March 24. This episode will center on the shocking murder of a Wall Street trader, with Castle and Beckett discovering that the murder victim was an undercover informant working with the U.S. Attorney's office.

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

The twist is that the U.S. Attorney involved in the case is Elizabeth Weston (guest star Salli Richardson-Whitfield), the estranged sister of Captain Gates (Penny Johnson Jerald).

Episode 20 is titled That '70s Show, with the central conflict surrounding a man named Harold Metzger, who is linked to '70s crime boss Vince Lamotta. Harold is described as "likable, funny and unbelievably charming," which may sway things as Castle and the others investigate the case.

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

Watch the promo for the next episode of Castle below:

Tags: Castle television ABC