Voltron: Defender of the Universe Season 1 Episode 42 Building A New World

Hazar issues an ultimatum to the Explorer and her crew vacate the planet or he will obliterate it. Jeff, Cliff, Krik and the rest of the Voltron Force try to stop them, but the planet is too fragile and begins to explode. To escape the doomed planet, the Land, Sea and Air Teams must combine to form Voltron while under heavy attack from all sides.