Sam and Dean allow themselves to be arrested in order to investigate a series of murders inside a penitentiary. However things get complicated when FBI agent Henricksen shows up to take over their case.

In next week’s episode of Supernatural, “Folsom Prison Blues,” Sam and Dean investigate a series of murders that have taken place in a prison – allegedly committed by a ghost. In order to get inside, the Winchester brothers decide to allow themselves to be arrested. Initially charged with breaking and entering, they find themselves in deeper trouble when FBI Special Agent Henricksen (played again by Charles Malik Whitfield) shows up.  Read on for spoilers! 
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