The third season opens with the Robinsons facing an immediate departure from their current planet—a situation echoing the start of the previous one. Once adrift in space, the family robot is lost overboard and requires a daring rescue. Thei…

The Jupiter 2 and its crew have been swept into a bewildering space-time distortion! When events appear to settle back into their familiar course, they are astonished to find Earth suddenly close at hand and resolve to return. Despite being…

Dr. Smith responded to a desperate signal emanating from an extraterrestrial vessel. He reached it via Space Pod and found himself asked to perform what was essentially a complex repair on their leader. It emerged that these beings were a c…

Echoing the spirit of an earlier adventure, "The Challenge," Professor Robinson and the Robot brought their Space Pod down upon a new world. There, Professor Robinson swiftly dispatched a monstrous attacker—only to learn that his actions ha…

These early inhabitants are, in truth, under the care of a computer named Protinius, which can grant fleeting moments of heightened awareness to their leader, allowing it to convey its intentions. The episode also depicts a brief and une…

Deep within the cavern, Dr. Smith and the Robot continued their exploration. Smith manipulated a series of prominent controls on a large panel, triggering the activation of a device designed to create cyborgs. Now, it fell to Will to interv…

As they prepared to depart their own world, the Robinsons encountered a young alien boy named J-5. They resolved to take him along, intending to return him to his home planet. Their journey led them to an unusual vessel, which they discover…

A mishap sent Dr. Smith, Will, and the Robot hurtling into space aboard the Space Pod. They found themselves on a planet governed by an alien mechanism—a device that conjured bewildering illusions, designed to disorient newcomers and force …

The Robinsons encountered a band of interstellar wanderers, self-proclaimed "space hippies," intent on dismantling the very world they now called home. It fell upon the Robinsons, alongside the ever-scheming Dr. Smith, to thwart their destr…

A peculiar blue fog periodically descends upon the Jupiter 2. Separately, Dr. Smith and Will express a desire for solitude. As the mist rolls in, crew members inexplicably begin to vanish, leading Dr. Smith to suspect his own culpability. U…

The Robinsons found themselves confronted by two Aliens, dispatched on a mission to hunt down an escaped Robot Prisoner they suspected was hiding aboard the Jupiter Two. Unbeknownst to them, the fugitive Robot had encountered another – a fo…

Suddenly, a caveman emerged and tried to coax Penny away, but she resisted his advances and was promptly ensnared in a net. This marked her transport to an intergalactic menagerie, where she was destined for public display. Simultaneously, …

Two extraterrestrial criminals, posing as humans, adopted the guise of clients for a local tour operator named Zumdish. With Zumdish’s unwitting assistance, they departed, leaving Dr. Smith behind. He then conceived an ambitious plan to con…

The Robinsons offered sanctuary to a princess escaping pursuit by a relentless bounty hunter. When Will was seized by this pursuer, he was held as leverage – a bargaining chip meant to secure the princess’s surrender. It fell then to the fa…

Professor Robinson found himself ensnared by a dimensional ray, abruptly transported to an alien realm where he encountered a mirrored version of himself and Don. This new reality was a perverse reflection of his own – an anti-matter world …

The Space Pod descended onto a world populated by beings who shared an unsettling uniformity, yet yearned above all else for distinction. The Robinsons found themselves captured by these creatures, who proceeded to fabricate perfect replica…

Under the command of Captain Kraspo, a search party scours the starways for the vanished Princess Alpha. A young woman named Will joined their company, and her resemblance to the missing royal led them to believe she might be the princess h…

Will was carrying out an experiment within a cave when he apprehended a man who asserted himself to be the controller of time for the entire universe. This "Time Merchant" then led Will, Professor Robinson, Smith, and the Robot to his hidde…

Without warning, the Robot declared that the Jupiter II was nearing Alpha Centauri. A collective gasp rippled through the crew; moments later, the ship settled onto an alien world. There, they were met by a group of beings who appeared to b…

Poor Don West found himself dispatched to a prison camp—and alongside Dr. Smith! While Don and Dr. Smith were installing some equipment, the latter encountered an alien escapee from the prison. The fugitive quickly convinced Dr. Smith to…

The galaxy’s most flamboyant impresario, Farnum B, is back at the helm of the Miss Galaxy Beauty Pageant. They insist Judy participate, though she resists; Dr. Smith, however, secretly enters her name, and the spectacle unfolds.

Dr. Smith discarded a rampant plant, only to find it swiftly attaching itself to the Jupiter 2 as soon as it was outdoors. It seemed the plant regarded her as its mother, while a courageous space warrior struggled to free the ship from its …

Doctor Smith piloted the Space Pod down to a planet drifting alongside the Jupiter II. He discovered a world where vegetation had risen to become the dominant life form – remarkably intelligent plants among them. One such specimen, an enorm…

The Jupiter 2 descended upon a world seemingly devoted entirely to discarded wreckage – a vast, planetary junkyard. With their stores of sustenance rapidly diminishing, Dr. Smith hatched a scheme: he intended to sell both the robot and the …