A planet with a pre-industrial humanoid society, where an amnesiac Data unknowingly spreads radiation sickness among villagers in the Next Generation episode Thine Own Self.
Barkon IV is home to a humanoid people at a pre-industrial stage. In Thine Own Self (2370), Data is sent to recover radioactive debris from a Federation probe that crashed there. An overload wipes his memory, and he wanders into a village carrying a case of the fragments.
The magistrate Garvin and his daughter Gia take him in and name him Jayden. The metal pieces are sold and made into jewellery, and the villagers begin to sicken. The healer Talur has her own theories, while Data works out the true cause by experiment.
He puts a remedy into the village well, but a frightened mob led by the blacksmith Skoran runs him through. The villagers bury him, and Riker and Crusher later recover him in disguise.