- For other uses, see Green.
In 2265, Green was performing helmsman duties on the bridge while the senior staff were attending Lieutenant Lee Kelso's memorial service in the ship's chapel. (TOS - My Brother's Keeper novel: Constitution)
The creature then took the form of Green and beamed back up to the Enterprise with the landing party. Once aboard, the creature kept the appearance of Green in order to search for more salt, and almost caught Yeoman Janice Rand. After a while, the creature abandoned the image of Green and instead assumed a form he could read from his prey's minds.
When Green's body was eventually discovered on the surface by Dr. Leonard McCoy and Captain Kirk, they realized that they were dealing with a threat that could take any form and eventually the creature was killed. (TOS episode: "The Man Trap")