Junkyard in Space - Lost In Space TV series (1968)
(this was the final episode of the series)“A fire breaks out aboard the Jupiter 2 and the Robinsons must land on a nearby planet to make repairs. They momentarily lose contact with the Robot, who has taken the space pod to scout ahead.
Upon landing, the family discovers the entire planet is a massive junkyard run by a strange metallic junkman who has no intention of letting the Robinsons leave.
When the ship’s food supply becomes contaminated by a “rust blight,” Dr. Smith bargains with the junkman for food, offering parts from the Robot to replace the junkman’s own degrading circuits.
The junkman eventually sets his sights on Jupiter 2, and after upgrading himself with the Robot’s parts, he steals the ship with Dr. Smith aboard and leaves the Robinsons behind.
Will follows in the space pod hoping the Robot’s memory banks, now part of the junkman, can influence a change of heart.”
Guest star: Marcel Hillaire (Junkman)
https://en.wikipedia.org/wiki/List_of_Lost_in_Space_episodes#Season_3_(1967%E2%80%9368)