is a science fiction TV-show aired from 1966 until 1969. It was created by Gene Roddenberry
. To distinguish the show from other Star Trek
shows, the series are usually referred to as "The Original Series" (TOS).
The first appearance of the Klingon
s was in the episode "Errands of Mercy". The Klingons returned several times, but there was no Klingon word spoken ever. In the episode "Trouble with tribbles" the language of the Klingons was named "Klingonese" or "Klingonee".