It’s been a tough few weeks for Castle fans. First, it was announced castmembers Stana Katic and Tamala Jones would be leaving the ABC series. Then, it was announced the drama had been cancelled after eight seasons. Star Nathan Fillion recently addressed the show’s cancellation on Twitter.

Castle stars Fillion as the mystery novelist Richard Castle, who teams up with NYPD homicide detective Kate Beckett (Katic) to solve crimes.

On Twitter, Fillion wrote to his fans:

Dear Fans,
In whatever project I do next, loudly notice how unlike Castle and fresh and versatile I am. Thanks.

— Nathan Fillion (@NathanFillion) May 13, 2016

Dear Every Director,
It appears I have an opening in my schedule.

— Nathan Fillion (@NathanFillion) May 13, 2016

The season eight, and now series, finale of Castle airs on May 16th. 

What do you think? Are you a Castle fan? Are you sad it’s ending?