Lost in Space - Episode Guide

The Robinson family find themselves crashing on an ice-covered planet after their colony ship, the Resolute, is destroyed. Now the family must survive with the help of an unforeseen ally.

Don and "Smith" land on the planet and find another survivor. Meanwhile, John, Maureen, Will and the Robot go to investigate the Robot's ship, and Will learns more of the Robot's origins.

While trying to blend in with the Robinsons aboard Jupiter 2, "Dr. Smith" remembers what led her to join the colony mission to Alpha Centauri. Meanwhile, the family deals with an infestation of fuel-eating eels.

The Robinsons contact another stranded family, the Watanabes. While they explore a piece of wreckage with Don's help, the Robinson children set out to hide the Robot when they discover more colonists are on the planet.

Under Victor's direction, the colonists build a light tower to signal the Resolute visually. Meanwhile, John learns what Will did with the Robot, and Maureen discovers that the planet is in danger.

Don tells Victor that he knows where they can find fuel to escape the planet. Meanwhile, Maureen debates the ethics of telling the colonists about the planet's impending destruction, Smith continues sowing dissent against the Robot, and Penny takes Vijay for a swim.

While Smith tries to reassemble the Robot, Penny helps Will with a model, John and Maureen go after the Chariots, and Judy deals with losing her first patient.

The colonists realize that they only have enough fuel to launch one Jupiter... if Maureen can find a way to lighten the load enough. Meanwhile, Smith continues to prey on the Robinson's minds even though they've locked her up.

While Judy sets out to find her missing mother, Will tries to contact John, insisting that his father isn't dead. Meanwhile, the colonists find a fuel source, and Smith tries to reassemble the Robot.

As the Resolute prepares to depart the system, Smith orders Maureen to leave the planet... even though John and Don are stranded somewhere in space.

The Robinsons and Don are forced to convert the stranded Jupiter 2 into a sailing ship when the hull springs a leak, letting in poisonous atmosphere. Smith sets out to prove her usefulness, and Will misses the Robot.

Penny and Maureen are swept into the trench, and the Robinsons try to figure out a way to rescue them before the lightning storm hits. Meanwhile, Smith reads Penny's book and learns about Don's past.

The Robinsons find the Resolute on their side of the rift and abandoned, and are soon evading one of the alien robots. Meanwhile, Smith takes steps to erase evidence of her old life and remembers the past.

The Robinsons are reunited with the Resolute survivors. Smith takes advantage of a bookmark, Will makes a new friend, John checks out a drill shaft, and Judy discovers that her medical experience doesn't count for as much as she hoped.

Judy runs against time to save John after the drill shaft collapses. Penny convinces Vijay to help her gather evidence against Smith, and Maureen and Will travel to the planet with Ben to investigate Will's connection to the Robot.

Penny tries to find a way for her and the others to escape the spreading contaminant. On the planet, Maureen, Will, and Ben find the Robot... or do they?

Kamal and Hastings receive an unidentified audio signal and John sets out to discover what it is. The Robot makes a friend and then loses it, and Ben has a change of heart.

Maureen takes control of the Resolute from Kamal to rescue the stranded colonists. John and Judy have a meeting of minds with Hastings, Don tries to help the OGS crew, and Will and Penny discover the Robot has another priority than helping them.

The Robinson children realize where the Robot is trying to take Scarecrow and help it escape the Resolute, and gain an unexpected ally Hastings strands John and Maureen in the gas giant.

The alien robots attack the Resolute, and the crew tries to evacuate before the invaders destroy them.

A year into their mission with the children of the Resolute, Judy, Penny and Will scramble to find the titanium they need to get to Alpha Centauri.

While Judy sets out to find Grant Kelly, Penny and Will explore a mysterious tunnel. Light years away, Maureen, John and Don hunt for SAR's remains.

Scarecrow helps Maureen and John plot an engine heist. Judy returns to camp with new passengers. Will makes a startling discovery in the alien city.

As the adults race to destroy all clues to the location of Alpha Centauri, the Robinson kids receive an ominous message from SAR.

After crashing on a boggy planet, Maureen and Judy contend with a massive salivating creature, while John and Penny work to free the trapped Robot.

The story of Don's run-in with SAR leads the Robinsons to an alarming realization. Will sneaks out on a dangerous solo mission.

The Robinsons race to get help for Will, warn the other colonists and activate a secret defense system. Vijay tags along with Penny on a risky outing.

As the battle for Alpha Centauri unfolds, the Robinsons and their friends risk everything to restore peace and pave the way for a better future.