ohmidog!

A “bad” dog, an “ugly” dog and a gaggle of “unwanted” beagles all prove that, deep down, they were not those things at all in the season premiere of “DogTown” Friday night.

All three stories show the benefits of looking a little deeper than the surface, but it’s the tale of Aristotle, a scab-ridden and a hairless mutt, that’s going to tug your heartstrings the hardest.

A terrier mix rescued from a hoarding situation, Aristotle comes to DogTown with a skin condition that has left him a pitiful sight — his hair has fallen out, his skin is covered with scabs, and he has no apparent eyelids.

Veterinarians at Best Friends Animal Society, the southwest Utah sanctuary where the National Geographic Channel program is centered, set out to make a diagnosis on Aristotle and relieve his itching, in hopes his coat might grow back and he might get adopted.

Aristotle’s story is one of two told in “The Survivors,” the first episode of the new season of “DogTown,” which airs Friday at 10 p.m.

DogTown vet Mike Dix calls the skin condition the worst he’s even seen, and eventually enlists the help of a veterinary dermatologist to help him figure out what caused it.

It turns out to be mange, a parasite that infests skin and hair, and a series of infections that followed. To make matters worse, a previous caretaker apparently tried to treat it, but neglected to dilute the topical medicine, leading to chemical burns around the dog’s eyes.

After treatment with anti-fungals, anti-biotics, lots of medicated baths and two months in foster care, Aristotle is a changed dog. Indeed, he has a coat, brown and white, and speckled. He’s playful, instead of scared and shy.

The season premier also follows the cases of a poorly socialized chow mix named Waylon, removed from an overburdened New York rescue organization where he attacked a worker, and a group of hunting beagles in Florida rescued just before they were scheduled to be euthanized.

We won’t give away the endings, except to let you know they’re happy.