Board Thread:Questions and Answers/@comment-26431570-20150928052238/@comment-5398126-20151001022648

Well, she may be in season 4 a bit earlier, you never know, I mean, we don't know for sure yet that she was on Earth when it was destroyed. For all we know the Utroms may have found her and that's why Splinter and the Turtles couldn't find her.