Castle

You can watch Castle on Hulu.

Is Castle on Netflix? No, this show is not available on Netflix in the US.

After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.

There are 173 episodes and 8 seasons of Castle.

Yes, Castle was cancelled. 8 was the last one.

Castle cast is including:
Nathan Fillion as Richard Castle (173 episodes), Stana Katic as Kate Beckett (173 episodes), Jon Huertas as Javier Esposito (173 episodes), Seamus Dever as Kevin Ryan (173 episodes), Susan Sullivan as Martha Rodgers (173 episodes), Tamala Jones as Lanie Parish (173 episodes), Molly C. Quinn as Alexis Castle (173 episodes), Penny Johnson Jerald as Victoria Gates (93 episodes), Ruben Santiago-Hudson as Roy Montgomery (59 episodes), Maya Stojan as Tory Ellis (27 episodes), Toks Olagundoye as Hayley Shipton (22 episodes), Arye Gross as Sidney Perlmutter (17 episodes)

In the Season 7 finale, Beckett was faced with a choice about her future. Now that she's been promoted to Captain, how will New York's famous couple adapt in Season 8?