Dr. Smith, no longer permitted to live in the Robinson camp, takes refuge in the wreck of an alien spaceship. Here, he finds a machine that makes wishes come true. To convince the Robinsons to allow him back into the Jupiter 2, he gives the machine to them. But the machine allows greed to dominate their lives and the Robinsons demand that Smith get rid of it. He does not, but soon after the machine’s original owner, a strange creature, returns to retrieve it.
original airdate--November 24,1965