They are already busy filming the fourth season of Castle and the episode titles have been steadily streaming, as well as a couple of well known guest stars. Modern Family's Kevin Daniels and Judging Amy and Private Practice alum Amy Brenneman have scored screen time in the upcoming season of Castle. Below are a list of the episode titles we know so far and a whole batch of behind the scenes images.
Season Premiere September 24th ~ "After the Storm"
Episode 2 ~ "Secret's Safe With Me"
Episode 3 ~ "Cloudy With a Chance of Murder."
Episode 4 ~ "Swan Song"