The Hatumans from planet Bowler, whose environment had been destroyed by global warming, traveled to Earth in search of a new planet. They visited several planets with Dr. Panama Hat and Dr. Beret but found each one unsuitable for various reasons. They encountered humans and learned of the environmental problems facing Earth. Unable to find a replacement for Bowler, Dr. Hat and Dr. Beret prepared to return home while Dr. Moon and Dr. Sunnyday remained to help humans address the climate crisis.