Stana Katic and Nathan Fillion are spotted filming Castle on 7th Street in Los Angeles last week (August 10). Even though the show is set in New York, it's actually filmed on the West Coast.
At Comic-Con last month in San Diego, Fillion talked about how things might change now that a female captain has taken over for Montgomery (Ruben Santiago-Hudson), who was killed in the finale:
"Castle is accustomed to being surrounded by women, he's accustomed to people adoring him. He thinks pretty highly of himself, he thinks he's pretty charming and he's never had a lot of trouble in that area. I think you get him, certainly with the Kate Beckett situation, she does like him but she tries not to let on and he drives her crazy.
"But when you have someone like our new captain who is not swayed by his charms, who does not see a use for him being around when she has plenty of good cops, you have someone who's a thorn in Castle's side. But Castle is not someone who takes failure to heart."