A peculiar group of space dwellers with their own unique customs is encountered by the Robinson family, sparking Zachary's optimism that they might hold the key to his return to Earth.
Aired: Sep 15, 1965The Jupiter 2's launch is imminent, but a sinister presence among the crew po...
Aired: Sep 22, 1965The spaceship Jupiter 2 finds itself ensnared in a colossal, foreboding vesse...
Aired: Sep 29, 1965A spacewalk by Doctor Robinson takes an unexpected turn when he's suddenly su...
4. There Were Giants in the Earth
Aired: Oct 6, 1965As their planet's orbit teeters on the brink of disaster, the Robinson family...
Aired: Oct 13, 1965A devastating heatwave threatens the Robinsons as the planet's temperature dr...
Aired: Oct 20, 1965A lone space traveler from Earth crash-lands on a distant planet, only to fin...
Aired: Oct 27, 1965Penny's adventure takes an unexpected twist as she discovers a mysterious cav...
8. Invaders from the Fifth Dimension
Aired: Nov 2, 1965Macabre aliens seek a humanoid brain upgrade, capturing Smith in the process,...
Aired: Nov 9, 1965In the next episode, a seemingly ordinary snack has an unexpected consequence...
Aired: Nov 16, 1965A small, crab-like robot signals the arrival of a Tauron family, sparking a d...
Aired: Nov 23, 1965A mysterious device capable of granting wishes is discovered by the Robinsons...
Aired: Nov 30, 1965The Robinson family faces a desperate situation when Will's experiments unexp...
13. One of Our Dogs Is Missing
Aired: Dec 7, 1965As the men venture on a perilous mission, the Robinson women find themselves ...
14. Attack of the Monster Plants
Aired: Dec 14, 1965Exiled from camp, Dr. Smith discovers extraordinary alien plants capable of d...
Aired: Dec 28, 1965Will lands in Vermont's Hatfield Four Corners, seeking assistance after using...
Aired: Jan 11, 1966A mysterious figure, The Keeper, travels the galaxy to collect rare animal pa...
Aired: Jan 18, 1966A sudden release of animals on the Robinsons' planet creates a dire situation...
Aired: Jan 25, 1966Captain Alonzo P. Tucker, a space buccaneer with a charming facade, conceals ...
Aired: Feb 1, 1966A desperate Doctor Smith attempts to mend his fractured bond with his distant...
Aired: Feb 8, 1966The Robinsons' repair of a malfunctioning robot takes an unexpected turn when...
Aired: Feb 15, 1966In the next episode, Penny discovers a mysterious mirror that transports her ...
Aired: Mar 1, 1966Two human opponents clash with an extraterrestrial duo in a brutal, winner-ta...
Aired: Mar 8, 1966The Robinsons' food supply hangs in the balance when Doctor Smith makes a dra...
Aired: Mar 15, 1966The euphoria of Doctor Smith's new role as leader of an alien civilization is...
Aired: Mar 29, 1966A peculiar group of space dwellers with their own unique customs is encounter...
Aired: Apr 5, 1966A ring imbued with the power to transmute any object into pure platinum spark...
Aired: Apr 12, 1966A princess, previously dormant, is brought back to life by Will's actions, se...
Aired: Apr 19, 1966Their adventure takes a surprising turn when they stumble upon an enigmatic s...
Aired: Apr 27, 1966John's body is possessed by a malevolent entity, driving the Jupiter 2 toward...
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