Land of the Giants

Steve and Mark spot an attractive Earth girl in a giant jar. Steve believes it is a trap, but Mark disagrees. Later, Mark returns and frees the girl as giants approach. They don't pursue Mark and the girl, who run off into the woods.

The girl is named Marna and is the daughter of a Earth scientist Mark knew, who ended up on a space flight with his wife and daughter and ended up in the Land of the Giants. Marna was raised by the giants, and wants Mark to join her in her perfect life.

Mark eventually goes into her miniature house, and discovers that Marna is essentially being used as a guinea pig. She gives him a gift: a giant diamond, and tells him to give it to the others. The diamond case has a tracking device, and it's a trap for the giants to capture the rest of the Earthlings.

Coming to his senses, Mark goes back to the others and they attach the transmitter to a giant turkey that Fitzhugh tried to capture for supper. It goes off, leading the giants on a wild goose chase, while Mark realizes Marna will never want to live a "free" life.