Rethso

Rethso was husband to Moela and father of Lunon. He and his family formed the advance party of a colonization attempt from his planet, Tauron. He was not violent or aggressive, but when his son went missing, he was willing to take arms against the Robinsons, whom he blamed for the boy's disappearance. Despite their misunderstandings, the Taurons and the Robinson party were eventually reconciled, although the Taurons had to leave the planet due to their susceptibility to human disease. Actor Don Matheson, who portrayed Rethso, has hinted that it was originally a speaking part and that he recorded 'telepathic messages,' but producer Irwin Allen decided that Matheson's acting was able to convey the messages without words, and so eliminated the Taurons' dialogue completely