In 2268, D'Amato was among the landing party that investigated an ancient Kalandan outpost, giving D'Amato the opportunity to explore a planet that was only a couple of thousand years old. According to Kirk, the potential discoveries could enable D'Amato to give a report startling the Fifth Interstellar Geophysical Conference. However, D'Amato was soon killed by a projection of the planet's defense system while searching for an underground water source. (TOS: "That Which Survives")
Star Trek II: Biographies gives his first name as Arthur.