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Lost in Space (1965 – 1968)

1965 • 3 seasons • Comedy, Sci-Fi & Fantasy • TV-PG
On September 22, 2026
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All seasons

Lost in SpaceSeason 1

29 episodes · Sep 15, 1965

In 1997, facing an Earth overwhelmed by population, Dr. John Robinson led his family on a pioneering mission aboard the Jupiter 2—a voyage to a distant planet orbiting Alpha Centauri. Along with a skilled pilot and their resourceful robot companion, they embarked on what was meant to be humanity’s next great leap forward. But their journey took a disastrous turn when the enigmatic Dr. Zachary Smith, secretly working for an unknown power, infiltrated the ship. His sabotage—reprogramming the robot to destroy the Jupiter 2 and its crew—backfired spectacularly, leaving him stranded aboard as his very presence unexpectedly altered the vessel's trajectory, hurtling them straight into a devastating meteor storm. Desperate, Smith frantically roused the sleeping crew from suspended animation, narrowly averting complete disaster. Though the Jupiter 2 survived, it was irrevocably damaged and hopelessly lost in the vastness of space. Eventually, they crash-landed on an uncharted alien world—a place young Will later named Priplanus—where their survival became a season-long struggle against the unknown. And Smith? He remained with them, a constant source of bumbling cowardice and mischievous schemes, perpetually taking advantage of Professor Robinson’s unwavering capacity for forgiveness.

1. The Reluctant Stowaway
Sep 15, 1965 · 51m · 7.0

In 1997, the Robinson family embarked on a journey to colonize Alpha Centauri. Unbeknownst to them, a foreign agent—known only as Dr. Smith—had stowed away aboard with the intention of undermining their mission. His presence disrupted the s

2. The Derelict
Sep 22, 1965 · 51m · 6.5

The Jupiter 2 was drawn inexorably into the vast interior of an immense, alien vessel, revealing within it strange beings shaped like luminous bubbles. As John and Don searched for navigational charts and essential supplies, Dr. Smith and W

3. Island in the Sky
Sep 29, 1965 · 51m · 6.7

Professor Robinson ventured ahead, hoping to survey the planet his family intended to land upon. However, his para-jet propulsion system malfunctioned; Dr. Smith had deliberately disabled it. Despite her further sabotage of the Jupiter II’s

4. There Were Giants in the Earth
Oct 6, 1965 · 51m · 7.0

As John realized the planet was destined to drift away from the sun, the Robinsons prepared for survival, moving southward. Doctor Smith remained behind at the Jupiter 2 landing site, while the Robinson family stumbled upon both a monstrous

5. The Hungry Sea
Oct 13, 1965 · 51m · 6.0

Professor Robinson’s calculations revealed a disturbing truth: the planets' orbital path would expose the spaceship to searing heat. Armed with this knowledge, the Robinsons departed in the chariot, heading south. Meanwhile, back at the Jup

6. Welcome Stranger
Oct 20, 1965 · 51m · 5.3

Upon landing on the alien world, Jimmy Hapgood was welcomed by the Robinson family. Having assisted in repairing his spacecraft, they then attempted to persuade him to return Will and Penny safely home to Earth. Meanwhile, Dr. Smith plotted

7. My Friend, Mr. Nobody
Oct 27, 1965 · 51m · 6.3

Penny began to envision a presence, a vital essence dwelling beneath the earth’s skin. A careless action by Dr. Smith resulted in an injury to Penny, and with it, the subterranean being unleashed its fury upon the world, venting its resentm

8. Invaders from the Fifth Dimension
Nov 3, 1965 · 51m · 7.0

A radiant, otherworldly presence seized Dr. Smith, intending to supplant their failing computer with his own mind. He negotiated with his captors, and in turn, they turned their attention toward young Will, attempting to utilize *his* intel

9. The Oasis
Nov 10, 1965 · 51m · 5.7

After consuming an unfamiliar fruit of extraterrestrial origin, Dr. Smith found himself abruptly transformed into a being of immense size. Believing this bizarre occurrence to be the work of the Robinsons – convinced they had conspired agai

10. The Sky Is Falling
Nov 17, 1965 · 51m · 5.3

The Robinsons found themselves unable to communicate with a visiting family who had also arrived on the planet. These newcomers were called Taurons, and their intention was to establish a colony here. However, Dr. Smith created friction bet

11. Wish Upon a Star
Nov 24, 1965 · 51m · 6.3

The Robinsons, weary of Dr. Smith’s presence, ejected him from the Jupiter 2. He sought shelter aboard a derelict spacecraft and there discovered a device capable of conjuring anything imaginable. Hoping to regain their favor, he presented

12. The Raft
Dec 1, 1965 · 51m · 6.7

Will and Dr. Smith found themselves in a wide, looping trajectory that brought them gently back to the surface, landing not far from the Jupiter II.

13. One of Our Dogs Is Missing
Dec 8, 1965 · 51m · 6.0

While the boys of the Jupiter 2 were occupied installing communications equipment, the women found themselves the focus of a standalone episode. Smith was left in command – a questionable decision, to say the least – and attempted to “clean

14. Attack of the Monster Plants
Dec 15, 1965 · 51m · 5.8

The flora had swelled to colossal sizes, possessing a disturbing ability to replicate anything introduced within their reach—though each imitation was formed entirely of plant matter and served no practical purpose. To prevent the vegetatio

15. Return from Outer Space
Dec 29, 1965 · 51m · 6.3

This was Lost in Space’s sole Christmas broadcast. Will employed an alien device to transport himself back to Earth, yet widespread reports had declared the Robinson family lost after the ship veered drastically off course. Upon his arrival

16. The Keeper (1)
Jan 12, 1966 · 51m · 6.7

Michael Rennie portrays The Keeper, a man whose profession is zookeeper. He harbors a disturbing desire: to gather up the children and incorporate them into his own peculiar assortment. Notably, this installment marks the sole two-part

17. The Keeper (2)
Jan 19, 1966 · 51m · 6.7

This marks the second appearance of the zookeeper, portrayed by Michael Rennie. Rennie delivers a truly remarkable performance as The Keeper. His subtle and restrained acting maintains a compelling dramatic tension that likely wouldn’t be p

18. The Sky Pirate
Jan 26, 1966 · 51m · 5.5

The Robinsons encountered a traveler from beyond the stars, who revealed himself to be an Earthman named Alonzo P. Tucker—a man taken from Punxsutawney, Pennsylvania, by extraterrestrial beings back in 1876. Mr. Tucker quickly charmed Will

19. Ghost in Space
Feb 2, 1966 · 51m · 6.0

Dr. Smith conducted a séance with the hope of reaching his Uncle Thaddeus. Instead, he inadvertently summoned a spectral being that wreaked havoc upon the Robinson household. It was eventually determined that this “spirit creature” was not

20. War of the Robots
Feb 9, 1966 · 51m · 6.7

Will and Dr. Smith discovered yet another automaton. This one, far more advanced than their own creation, began a deliberate campaign to earn the Robinsons’ trust. However, at a crucial juncture, its intentions were revealed: it intended to

21. The Magic Mirror
Feb 16, 1966 · 51m · 6.3

Penny and Judy came across a looking glass, and found themselves staring into an unexpected presence beyond its surface. In a blink, they were swept through, arriving in a mirrored world inhabited by a single soul: a young man, yearning for

22. The Challenge
Mar 2, 1966 · 51m · 6.0

A young alien, dispatched to Priplanis to confirm his claim as a prince, finds himself entangled in a deadly contest without his father’s knowledge. When his true purpose is revealed, John steps forward to take his place in the challenge; s

23. The Space Trader
Mar 9, 1966 · 51m · 5.3

When a sudden storm destroyed the Robinsons’ remaining provisions, a trader appeared, offering food in exchange for the equipment they still owned. Dr. Smith seized the opportunity, trading the robot for supplies and secretly storing the

24. His Majesty Smith
Mar 16, 1966 · 51m · 5.3

Doctor Smith found himself unexpectedly appointed to lead a people not of this Earth. Unbeknownst to him, those who held positions of authority among them were regularly offered as sacrifices, swiftly supplanted by others deemed equally dis

25. The Space Croppers
Mar 30, 1966 · 51m · 5.0

The Clampetts find themselves transplanted to the strange land of Priplanis. As darkness descends, one of the native inhabitants undergoes a startling transformation into a creature resembling a werewolf. The group is led by a sharp-witted

26. All That Glitters
Apr 6, 1966 · 51m · 5.3

This reimagining of "The Midas Touch" finds Dr. Smith imbued with the unsettling ability to transmute any substance into platinum. Penny receives a curious gift from a desperate thief fleeing capture; he urges her to safeguard it, hinting a

27. The Lost Civilization
Apr 13, 1966 · 51m · 6.0

While charting the unexplored regions of the planet, the Robinsons stumbled upon a hidden civilization dwelling beneath the surface. Will inadvertently roused a slumbering princess, who now desires that he stay and share her throne.

28. A Change of Space
Apr 20, 1966 · 51m · 5.5

The Intergalactic Delivery Service arrived on Priplanus. Once more, Dr. Smith sought passage, and Will was asked to “test drive” the spacecraft. When Will returned, he possessed a markedly greater intelligence than he had before. Recognizin

29. Follow the Leader
Apr 27, 1966 · 51m · 7.0

A strange presence had taken hold of John Robinson, a foreign consciousness exerting its will upon him. This unseen force compelled the family toward an unsettling readiness – a preparation for departure to a distant world, the spirit’s own

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