When criminals in this world appear
And break the laws that they should fear
And frighten all who see or hear
The cry goes up both far and near
Sweet Polly Purebred has once more fallen into the hands of unfeeling scientist Simon Bar Sinister. Simon has cloned Polly and is even now downloading her memories into the clone so the clone can get close enough to Underdog to perform it's dastardly mission. As for Polly, well, once her memories are downloaded, she's of no further use to Simon. So Underdog better get there quick.
Found some pictures of Underdog and Polly on the net and it inspired this picture (Has it really been almost fifty years since this show premiered?). I tweaked her figure a little because I don't have to keep it simple for the purposes of cheaper animation.