As the clock ticks down toward the Resolute’s departure, the Robinsons scramble to get off the planet — and out from under Dr. Smith’s thumb.

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

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

Maureen debates whether to share what she saw in the sky, Don leads a mission to find fuel, and the robot’s presence stokes tensions within the group.

As the team builds a tower to signal the Resolute, Maureen investigates a planetary anomaly, and Will braces for a tough conversation with his dad.

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

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

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

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.