Whatever happened to them???? I think they were introduced in season 3 (I can't remember), but then they went away. I've been waiting for that part of the story to develop but it hasn't yet. It would be interesting if they both work for the "shadows" or something. Then the light vs. dark or good vs. evil theme could be explored more. Regardless, I liked the season 6 finale. LOVED how Aiden came to Melinda's rescue. That was a nice touch and a great ending for the season (or series).