Filming for season 3 is set to begin in March 2013 (it was going to be in January, but is was pushed back), so based on that it is believed to return late 2013 or early 2014. A bit of a wait, but worth it!
don't take this as a spoiler but it has been out for a long time and luckily he does not die but Sherlock ****** **** ** ****** (don't want to spoil it all) I recommend you watch it
Yes. They will begin filming in August or September and the season will begin in late September.
There is no date to when the premiere of season 3 will begin.
season 3 should start in 2009
09/20/10 is when Castle season 3 will begin.
There are 3 episodes per season, but each one is 90 minutes long.
The 3rd season will begin in September 2010
Season 3's first episode aired on September 13th, 2010.
September 3
the show was canceled
September 15