Half-Tooth was a male Smilodon and protagonist of the Walking with Beasts episode Sabre Tooth.

Half-Tooth and his pride have returned from a successful hunting trip when a pair of young male Smilodon appear and challenge him for control of the territory. Though he bravely tries to hold them off, Half-Tooth is no match for two much younger males and is finally forced to run, fleeing his home to live in exile in the wilderness.

Unable to hunt by himself, Half-Tooth is able to eke out a living as a scavenger, chasing smaller predators off their kills to feed himself. He makes it a habit to patrol his old scent-marking posts, examining the brothers' urine scents for a sign of weakness. One day, he discovers one of the usurpers had stopped marking some time ago. Seeing his chance, Half-Tooth returns to his domain, roaring his challenge to the surviving brother. The two cats begin a ferocious battle of youth vs experience. Finally, Half-Tooth chases down the pretender to his throne and finishes him. The battle won, the deposed king returns to his pride and retakes his usual basking spot.