Stana Katic has been dazzling audiences as hard nosed detective Kate Beckett on ABC's Castle for 8 seasons. But that run will come to an end. The network has cancelled the long running drama which co-stars Nathan Fillion. This comes after last week announcing the show would return for season 9, but without Katic, which obviously had fans riled up. Katic penned a goodbye note to the show and posted it on Twitter, saying "Dear Castle fans, cast and crew: Your devotion to our show has carried us for these unforgettable eight seasons. I'm lucky to have met and worked with and for the lot of you.