Ensign Donald Ackroyd was a Human Starfleet officer who served aboard the Federation starship USS Enterprise in the late 2260s decade. Ensign Ackroyd served in the Enterprise biochemistry department and, in the year 2269, he accompanied Spock on the first landing party to Arachnae. Unfortunately, Ackroyd was killed by the Arachnians. (TOS novel: Vulcan!)