Lost in Space - Season 2 (1966)

The Robinsons encounter a hermit who plans to attack the Jupiter 2 with his army.

A space circus comes to town and the owner wants Will to run away with it.

The Robinsons are tried for space crimes and the evidence shows that Smith is really responsible for the mishaps.

Doctor Smith creates an android that they teach to be more human. A humanoid shows up looking for payment for the android.

Dr. Smith ends up in a boxing match with some space gladiators. If he wins he will return to Earth, and if he loses it won't matter because Earth won't be there.

Will, Penny and Dr. Smith get involved with a thief that is searching for a princess.

Jeremiah Smith shows up to kill Doctor Smith for his inheritance.

Zeno, an intergalactic gun fighter and Doctor Smith's doppelganger, switches places with Smith.

An alien harp is found. It's a gateway to a planet which is - or isn't hell.

The robot is stolen to create more robots so they can conquer the Earth.

Doctor Smith trades the Robinsons' emotions - in exchange for a trip home.

Penny befriends a toad-looking alien, whose race is fighting against the much more pleasant-looking golden aliens. One of them isn't what they seem?

The same woman who lured Smith into space returns still in love with Smith. He agrees to return to her dimension and Will gets turned green.

A space knight is following the questing beast who Penny becomes friends with.

Smith and Will find a toymaker's world inside an alien merchandise-ordering machine.

A space pirate looking for his crew that mutinied finds Will and Dr. Smith trying to repair his empty ship.

Through some harmless playacting, Dr. Smith unintentionally conjures up the magical gauntlets and war hammer of the Norse god Thor. Taking him for a mighty warrior, Brynhilda spirits Smith off to Asgard for a showdown with Thor.

A space wizard conjures up a spaceship so that Doctor Smith can return to Earth.

Shortly before lift-off, Dr. Smith discovers a cave inhabited by devices, which are the remnants of a once-mighty civilization; the Draconians. As the countdown draws near, Dr. Smith falls ever-more-so under the influence of the Draconians.

In this quasi-sequel to Lost in Space: The Sky Pirate (1966), Will's reunited with Captain Tucker, who along with his crew are searcing for a legendary lost treasure. The key to finding the booty is a metallic talking head in a box.

In the second of two sequels to Lost in Space: The Android Machine (1966), Verda's sheltered by the Robinsons after she's marked for destruction by the Celestial Department Store. To that end, the store dispatches a killer android: IDAK (Instant Destroyer And Killer).

A female alien meets the Robinsons and uses them to help erect an arch to bring her people to colonize the Robinsons' planet.

While in the Valley of Shadows the Robot is affected by strange forces and grows to the size of a building. Will and Dr. Smith enter the Robot to try to reverse the process and save him.

While John and Maureen are away observing volcanic activity, the alien scientist Lemnoc captures Don, Judy, Penny, and Dr. Smith and replaces them with android duplicates. Lemnoc then forces Will and the Robot to train the duplicates in survival skills, hoping that they will be an inspiration to his own people, who are losing the will to live.

The planet is invaded by an army of tiny robots who closely resemble the Robinsons' Robot and proclaim him as their long-predicted king. The Robot agrees to become their king, but when he is not the ruthless ruler they expected, they decide that he needs some "Dr. Smith" in him.

Will and Dr. Smith find a cave that transports them to Earth, 19th-century Scotland.

Penny will not give up the belt entrusted to her by an alien even if it means their deaths.