Kate and Rick enjoy their honeymoon on Castle. "Once Upon a Time in the West" is the seventh episode of the show's seventh season.

Castle and Beckett got married on Castle. "The Time of Our Lives" is the sixth episode of the show's seventh season.

Rick Castle accepts an award on Castle. "Hollander's Woods" is the 23rd episode of the show's seventh season.

Kate Beckett gets shot at a funeral on Castle. "Knockout" is the 24th episode of the show's third season.

Kate and Rick get some alone time in the Hamptons on Castle. "Murder, He Wrote" is the fourth episode of the show's fifth season.

Castle and Beckett enjoy breakfast at the loft on Castle. "The Time of Our Lives" is the sixth episode of the show's seventh season.

Kate Beckett and Richard Castle finally get married on Castle. "The Time of Our Lives" is the sixth episode of the show's seventh season.

The ABC series Castle premiered in March 2009. It's first season was ten episodes. The series starred Nathan Fillion and Stana Katic.

The main cast of the ABC series Castle included Seamus Dever, Tamala Jones, Jon Huertas, Stana Katic, Nathan Fillion, Molly Quinn, and Susan Sullivan.

Castle and Beckett were shot in their own loft on Castle. "Crossfire" is the 22nd episode of the show's eighth season.

It's all come down to this. Here is a photo of Rick Castle on the series finale of Castle.

It may have begun with murder but Kate Beckett had a back story and Richard Castle was intrigued. As Castle said, "The point is, there's always a story. You just have to find it." From the moment he profiled Detective Kate Beckett while they read fan letters from his crazy fans, we were hooked. Beckett looked shocked and a little mortified by how close he got to her story. To his credit, Castle looked chagrined that his attempts at guessing her history seemed to cause her pain. For fans, it was the start of a complex and provocative relationship of which we could never get enough.