It's back to school for Rick Castle on Castle Season 6 Episode 15.

Titled "Smells Like Teen Spirit,"  the installment will find Castle and Beckett looking into the murder of a popular high school student, with the prime suspect being a fellow student... who may possess telekinetic powers?!?

Yes, we're talking about a real life Carrie.

On Monday's new outing, look for Castle to reminisce about his days as a bad student and for him and Beckett to come across a terrible realization about their relationship. What is it? You better watch these clips now:

Watch Castle online if you need to watch up and click through photos from "Smells Like Teen Spirit" now:

Castle Photos from "Smells Like Teen Spirit"

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Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.