Synopsis

The Ro-Bear Berbils are a gentle community of robot bears inhabiting Third Earth. Unaware of this, Lion-O and Snarf inadvertently stumble into one of the Berbils’ traps. Rescuing them from their predicament, the Berbils forge an alliance with the Thundercats. Mumm-Ra subsequently launches an assault on the Berbil village, but the Thundercats intervene to defend it. In gratitude, the Ro-Bear Berbils assist the Thundercats in constructing Cats' Lair, a new stronghold for their operations.