Lost in Space - Season 1 (1965)

While spacewalking Doctor Robinson is pulled down onto a planet. Major West lands the ship to search for him.

Due to the planet's orbit, the Robinsons are going to freeze to death unless they head south.

After experiencing the extreme cold, the planet gets closer to the sun, roasting it. Smith sends the robot to warn the Robinsons.

The Robinsons meet a fellow Earth explorer who is also lost in space. They help him repair his ship and ask him to take Will and Penny home.

Penny strikes up a friendship with a deep voice in a deep cave.

Macabre aliens -- quite literally talking heads -- need a humanoid brain to replace a worn out computer in their spaceship. They capture Smith, but quickly realize that his brain is unsatisfactory. The aliens release Smith so that he can bring them somebody more suitable: "a small Robinson."

Smith eats some fruit that turns him into a paranoid giant.

A small, crab-like robot heralds the arrival of a family of colonists from an alien race called the Taurons. John believes that they are peaceful settlers, but Smith insists that they are the vanguard of an invading army.

Will and Dr. Smith come upon an alien machine that grants wishes, which tests the values of the Robinson group.

Will's "message-in-a-bottle" experiments deplete the supply of fuel for the Jupiter 2. John and Don work on an alternate fuel source, but they cannot stabilize the output. Deciding to build a smaller, 2-man craft, they pull the reactor chamber out and use Will's experiments to construct a "space raft."

With the men off on a mission, the Robinson women must deal with an alien intruder.

Banished from camp for his latest endangering behavior, Dr. Smith discovers alien plants that can duplicate things (including people), which he uses to his advantage.

Using a matter transfer device left behind by the Taurons, Will beams himself back to Earth. He arrives safely in the small town of Hatfield Four Corners, Vermont, but his pleas for help are considered the fantasies of a runaway boy.

The Keeper is an alien who travels the galaxy collecting living pairs of interesting or rare animals. His courtly overtures towards the Robinsons belie his true intention -- to add a pair of humans to his incredible menagerie.

Troubles with The Keeper would be over if Dr. Smith hadn't skulked aboard his ship and released all the animals, putting The Keeper in a position to blackmail the Robinsons for their children.

Will becomes fast friends with Captain Alonzo P. Tucker, an Earthling who escaped his alien captors to become a wandering space buccaneer. But Tucker's roguish charm hides a secret that could destroy them all.

Trying to contact his Uncle Thaddeus during a séance, Doctor Smith summons a ghostly monster native to the planet.

After the Robinsons repair a damaged robot, it first helps them and then plots to capture them.

Penny stumbles into an alien mirror and finds a universe occupied by one very lonely boy.

John and Will fight a battle with an alien father and son that is to the death.

After ruining the Robinson's food supply, Doctor Smith makes a deal with the space trader and gives his body for food provided he collects it in 200 years. The space trader comes to collect immediately.

Doctor Smith delights that he is made ruler of an alien species until he learns that he is also their sacrifice.

The Robinsons run into a group of space hillbillies whom Zachary believes might take him back to Earth.

Dr. Smith and Penny obtain a ring that will turn anything to platinum.

Will awakes a sleeping princess whom he now must marry. Her race has been awakened and now plans to conquer the universe starting with Earth.

A strange interdimensional ship turns Will into a genius and Dr. Smith into an old man.

An evil spirit possesses John Robinson and plans to fly the Jupiter 2 back to his home world, even at the expense of Will's life.