Original Airdate: October 6, 1965
The Jupiter 2 crew faces dangers on the planet they crashed on, including a gigantic cyclops, microbes in the soil that cause crops to grow out of control, and an erratic orbit that causes extreme heat and cold.
Watch Lost In Space There Were Giants In The Earth Online
The Robinsons set up camp on a planet populated by strangely evolving life forms. As the family moves their camp in search of warmth, they are confronted by a giant Cyclops.