Castle Complete Series 1-8 -

Beckett becomes Captain of the 12th Precinct. A mysterious organization called Loksat threatens her. To protect Castle, Beckett separates from him (they live apart but secretly work together).

The murder of Beckett’s mother, Johanna. Castle secretly investigates behind her back. castle complete series 1-8

Castle disappears on his wedding day (car crash, no body). He returns two months later with amnesia. The mystery of his disappearance is the season’s arc. Beckett becomes Captain of the 12th Precinct

Keeping their relationship secret from the department (briefly) and solving Beckett’s mother’s murder for good. castle complete series 1-8

Who is the “sniper” who killed Beckett’s mother? (The overall series arc starts here.)