I thought that Cyndi Lauper was going to appear every now and then...?

Hart has sagte that he wants her to come back, but she's a busy woman! :P Anyways, they've still got time, maybe season 6 :D

at first she was only set to do 5x01 (Harbingers under the fountain) but then they tried to get her for another episode in season 5 but she was unavailable due to her busy schedule. They have, however, sagte that they will try to get her for an episode in season 6 :D