Dr. Zone is a horse that belongs to the Nowhere Desert Dude Ranch. The old manager tells Sara and the Dr. Zone fan club that he was referring to the horse and not the real Dr. Zone after which they take pictures of the location thinking it was where episode 576 of the series was filmed. Afterwards, he reveals that the ranch was actually the shooting location of the episode and they named the horse after Dr. Zone, much to Sara's delight.