Malcor III was the inhabited third planet in its star system. The planet had a northern and southern continent, and its day lasted 29 hours. The nearest star system to Malcor III was the Garth system. Located over 2,000 light years from Earth, this was the homeworld for the Malcorians, a humanoid species. The planet was headed by a chancellor.
By 2367, the United Federation of Planets had had observers on the planet in preparation for first contact. A mishap occurred when William T. Riker, supporting the effort, became injured and was revealed as an alien. First contact was made in secret with Avel Durken, the planet's chancellor at this time. Durken asked the Federation to wait for formal first contact until their species was ready, so the USS Enterprise-D took their observers and left with their report. (TNG: "First Contact")