Corey Sevier had to be replaced as the voice of Warren because so much time had passed between the Halloween special and the series that his voice had changed. Julie Lemieux was chosen as the new voice of Warren. The rest of the original cast returned. Hillary Cooper, the voice of Tracy, is the same person as Hillary Goldhar. She got married between the special and the series. Warren's got a cold, but wants to go to school because it's Pizza Day.
click here to see where to watch or .
Ready to Watch Monster by Mistake, Season 1, Episode 1?