Castle: Season 8 Episode 21: Hell to Pay
Starring: Nathan Fillion, Stana Katic, Susan Sullivan, Jon Huertas, Seamus Dever, Matthew Borlenghi, Benjamín Benítez, Anne-Marie Johnson
Length: 42 minutes
Castle: S08E21 Description: Castle thinks the Antichrist may be involved in the death of an axe-wielding, psychiatric inmate who drops dead in the P.I. office.