Voltron: Defender of the Universe Season 2 Episode 39 Zero Hour Approaches

The Explorer and the Voltron Force reach the Drule home planet's protective asteroid belt. Throk has a command base there, allowing him to attack the fleet from the safety of the rocks. He also has a Robeast designed for asteroid to asteroid combat. The fleet doesn't have enough ammunition to press the attack, so it's up to Voltron to take out the base alone.