There isn't one, because it hasn't been cancelled. Kascnef82 was saying that it should be cancelled, not that it has been cancelled. I surely expect that it won't be back on NBC next year, though. Whether it returns on Sky Living is another question.
...and here I was certain you were going to post the cancellation notice.
First thing that came to my mind when I saw the post notification in my inbox!
And then after reading it I thought the reason there's no release date is they're waiting to see if the show gets renewed or not - no renewal, release now - renewed, wait until 2 weeks prior to air date.