Tiabo was a hermit. He told Will Robinson that he left his homeworld over 200 years ago to escape the large cities and crowds. He lived alone all that time until the Jupiter 2 crash landed on his planet.
Tiabo lived with a Giant Bird Monster that he used to try to frighten the Jupiter 2 crew away. When that failed, he masqueraded as an army officer and a general and told the crew that he planned to launch an attack against them with a secret weapon. Will recognized that Tiabo was acting and managed to convince him that the Robinsons posed no threat to him.
Dr. Smith had ingested a gallon of liquid explosive but when Will befriended Tiabo, Tiabo provided Smith with neutralizing pills to save his life.
