Lost in Space There Were Giants in the Earth (1965–1968) Online
After Will averts the Robot's murderous intent, the Robinson party comes under threat by native creatures at extreme size ranges. Parasitic microbes in the soil await catalysts to infest and grow into monstrous proportions while a giant cyclops roams the area. Adding to that, the weather takes an extreme turn for the worse, forcing them to abandon ship. A cave containing the remains of a civilized people provides temporary sanctuary but also a danger for the curious.
| Episode cast overview: | |||
 | Guy Williams | - | Prof. John Robinson |
 | June Lockhart | - | Maureen Robinson |
 | Mark Goddard | - | Maj. Don West |
 | Marta Kristen | - | Judy Robinson |
 | Bill Mumy | - | Will Robinson (as Billy Mumy) |
 | Angela Cartwright | - | Penny Robinson |
 | Jonathan Harris | - | Dr. Zachary Smith |
The title is a Biblical quote from Genesis 6:4.
While having Smith and the Robot stay behind is way of emphasizing Smith's attitude of not helping the Robinsons, it was actually done for a more practical reason. The first several episodes of the show reused various parts of the original unaired pilot which did not have Smith and the Robot as part of the crew. By leaving them back at the spaceship they could save a lot of money not having to film new sequences and just reuse the old footage.