Professor Robinson, after being trapped in a cave overnight, comes under the spell of an alien entity. The alien, desperate to leave the planet, guides the professor through the repair process, but others, seeing the change in personality, question the mental health of John Robinson. Will they manage to save the professor's humanity, or will the alien personality be successful at killing all those who threaten his plan?
glen_chapman / edited by statmanjeff
Did You Know?
One of the bug eyed idols used in the cave scenes was later used on the Time Tunnel series episode THE WALLS OF JERICHO as the god Keemash . Aired Jan. 1967. See more
In order for John to reach the room inside the cave containing the possessed alien mask and other artifacts, it was necessary that he be lowered down a chasm using a rope. However, later when Will and again when Don, Maureen and Judy enter the cave this room is now at ground level. See more
Dr. Zachary Smith
Be still, you bubble-headed booby!