 They produced the first half of the season simultaneously while working on the show's film adaption, "", which was difficult.The show's creators considered the third season an improvement on the previous season, due to a heavier focus on strong storytelling structure and character development, as well as increased creative control.In the second half of the season, the show was dealt a blow with the death of voice actress Mary Kay Bergman, who provided many of the female voices on the show.