- You may also be looking for voice actor Robert C. Johnson.
Robert Johnson was a Human male born in 2238, who was married to Elaine Johnson. During the 2260s, he was the leader of the experimental science colony on Gamma Hydra IV.
When the planet went through the trail of a comet in 2267, radiation hit the planet, causing all colonists to age rapidly and subsequently die by old age. Johnson survived until the arrival of the USS Enterprise and was brought to sickbay, but died soon after. (TOS: "The Deadly Years")
Robert Johnson was played by Felix Locher.