October. They don't make as many new episodes as they used to since they are involved in other ventures nowadays, especially since Book of Mormon.
the new episodes will come out in the US in September or October, they used to have 14 episodes every year and the first half aired around March or April, and the second half aired at the end of the year in October and November but since Trey and Matt have lots on there plate at the moment they decided to make less episodes every year, now they only make 10 new episodes a year!!!!
This fall.
