Lost in Space - Season 1 Episode 10 -

The Robinsons can not understand the language of a visitig family also on the planet. The aliens are called Taurons, and come to use the planet as a new colony. However Dr Smith causes problems between the two camps when he panics and draws a gun on the new family. The Tauron's end up not liking the planet and want to be alone, so they leave.