Portal Into Time (S01E11)

The sinister wizard Crom poses a threat to a human tribe at the Alamo. They have a chance to defend themselves with an advanced Guardian machine that deploys flying robot drones capable of neutralizing Crom's laser tanks. Unfortunately, it malfunctions and the necessary circuit is no longer available. Their only option is to sneak into Crom's stronghold to access his moon dial, which can transport them to Old Earth. In the 20th century, Thundarr, Ookla, and Ariel meet a young girl named Samantha, who assists them in finding a new circuit. After returning to New Earth, they prepare to confront Crom, grateful for their glimpse into the pre-apocalyptic past.