Judy sets out to find Maureen, while Will and Penny lead an expedition to the caves. Dr. Smith pursues a new escape plan.

The episode was rated 7.63 from 2416 votes.

Another crash brings more travellers to the planet as the Robinsons work to salvage their ship with help from their mysterious new companion.

The episode was rated 7.58 from 3162 votes.

Flashbacks reveal clues to Dr. Smith's past. The Robinsons contend with a new threat as the ship's fuel supply starts dropping -- fast.

The episode was rated 7.58 from 2907 votes.

While Dr. Smith moves ahead with his secret project, seismic activity wreaks havoc across the planet and leaves two teams facing impossible choices.

The episode was rated 7.57 from 2499 votes.

On the way to a space colony, a crisis sends the Robinsons hurtling towards an unfamiliar planet, where they struggle to survive a harrowing night.

The episode was rated 7.54 from 3676 votes.

The Robinsons make contact with another family of survivors, and Will races to protect his family after Judy learns what happened aboard the Resolute.

The episode was rated 7.53 from 2706 votes.

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 episode was rated 7.53 from 17 votes.

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.

The episode was rated 7.50 from 62 votes.

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.

The episode was rated 7.50 from 141 votes.

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.

The episode was rated 7.49 from 39 votes.