Enterprise is ordered to Organia, a planet that is of vital importance to the Federation and the Klingon Empire. The inhabitents of the planet are medieval in appearance and technology and have no worries about the Klingons being there. When Capt. James Tiberius Kirk and the Klingon Captain Kor come to blows, the planets inhabitents reveal themselves to be non-corpeal beings in order to halt the battle. The first appearance of the Klingons.