'Castle' Season 8 to Feature Beckett-Ryan-Esposito Feud; Richard to Dig up his Past? [SPOILERS]

Nathan Fillion as Richard Castle and Stana Katic as Kate Beckett in ABC crime drama 'Castle'.Facebook/Castle

The cast and crew of "Castle" Season 8 will take viewers through a roller coaster of events, with some surprising changes in Richard Castle (Nathan Fillion), Kate Beckett (Stana Katic), Kevin Ryan (Seamus Dever) and Javier Esposito's (Jon Huertas) lives.

While the mystery novelist will once again take up the role of a new investigator, the detectives will face some ups and downs in their professional as well as personal lives.