Jupiter 2's last landfall is a planet which is used as the galaxy's junkyard. With the ship's food supplies deteriorating, Smith sacrifices first the robot's parts to the planet's junkman, then Jupiter 2 itself.
Background information[]
- Marcel Hillaire returns after previously playing Phanzig in "Condemned in Space".
- Bob May liked that the Robot could not destroy himself because of the love he felt for Will.
- Guy Williams returns for the final episode of the series after being banished for two shows by Irwin Allen for laughing during "The Great Vegetable Rebellion."
- The power core is seen again in this episode, very different than in its first appearance in "the space creature". It appears to be a redress of the room with the rear porthole on the upper deck.
- The Robinsons never learned their lesson not to entrust Smith with any sort of responsibility because he will always foul it up.
- When the Robinsons are going to send Smith to investigate the cosmic cloud, they give him a helmet and gloves, but not the red garment, so it would not be a complete space suit.
- When the space pod launches, pinkish red smoke can be seen through the pod door window. This is presumed to be from some sort of rocket motor, but this smoke is never seen when the pod is in flight
- Why do they take so long to believe it's the Robot's voice coming over the intercom from the space pod? And why do they take so long to answer him?
- They actually filmed a new landing scene just for this episode instead of reusing previous footage for the 4th or 5th time. I'm amazed!
- Smith (fearfully): "Perhaps I should stay aboard to tend to the children. After all they do need some protection, you know." Will: "Don, can I go out with you? I've just gotta find the Robot." Once again, Smith proves to be more cowardly than the children.
- It's amazing how they seem to find cobwebs on so many planets they've visited throughout the galaxy. Who knew spiders were so ubiquitous??
- Why is the robot draped in a white sash??
- Judy asks "How can you dock the space pod in the Jupiter 2 while its still in orbit." In fact, orbit would be a perfect time to dock the pod.
- Is the junk man a living being or a machine (android)? He is silver like the androids in several of the series episodes and obviously requires many mechanical parts. Even his memory is mechanical and not organic.
- This is another LiS episode in which the fate of someone in the episode is never explained. In this episode we are never told what happened to the Junkman. Did the Robinsons leave him behind, or did they take him with him, as Will implied when persuading the Junkman to care for others?
- The episode appears to parallel the Season One Episode "The Space Trader". In both episodes, the First Family's food supplies are destroyed, and Dr. Smith trades the Robot for food with a mysterious merchant.
- Unusually, given this was meant to be a season finale episode (and ended up as the series finale), Judy, Penny and Maureen don't appear until well into the episode, despite the apparent danger to the ship in the teaser.