Nathan Fillion, who plays Richard Castle, Tweeted this: "All things must end. It has been an honor working with the men and women of Castle. I am truly amazed at what we've done. Thank you all."
Honestly, I would have resented, after 21 years as an actor, to be brought on a show simply to be somebody’s romantic interest. [Laughs] It’s not a soap opera. So I like the fact that work is No. 1 on her plate.