There will be numerous fun episodes of Castle coming up as season 6 nears its end, including plot lines featuring ninjas and the 1970s.

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The next episode of Castle is titled Room 147, as Enstars previously reported, and features a series of people confessing to the murder of a struggling actor despite not committing the crime. The episode is set to air Monday at 10 p.m. on ABC.

ABC recently released a sneak peek of this episode, with Beckett (Stana Katic) receiving a confession from a girl within 11 seconds. View the clip below.

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After Room 147, there will be a Beckett-centric episode titled In the Belly of the Beast, in which she faces off against a powerful enemy tied to her mother's murder.

Next is episode 18, which is titled The Way of the Ninja, an intriguing title that likely features a ninja-themed case for Beckett and Castle (Nathan Fillion) to solve.

Episode 19 is titled The Greater Good, which does not suggest anything specific, but episode 20 is titled That '70s Show, which is bound to be interesting.

The That '70s Show episode will feature a character named Harold Metzger, a man linked to '70s crime boss Vince Lamotta, according to E! Online. Intriguingly, 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 sneak peek for the next episode of Castle here:

Tags: Castle television ABC