Jahn's Friend is a fictional character portrayed by Keith Taylor in the TV series Star Trek.
In the first episode they appeared in, titled Miri (season 1), they were 16 years old.
They appear in 1 episodes out of a total of 79 aired
Episodes1
Miri
episode S1.E8 october 1966The Enterprise discovers a planet exactly like Earth, but the only inhabitants are children who contract a fatal disease upon entering puberty.