John Gill violates the Prime Directive

On Stardate 2534.0 the crew of the USS Enterprise investigated the loss of contact with Federation historian and cultural observer, John Gill, who had been assigned to the planet Ekos. They discovered that Gill deliberately violated the Prime Directive in an attempt to reorder the planet's society into a benign version of Nazi Germany. Captain Kirk acted to reduce the effects of Gill's interference in the hopes of restoring the peace that had existed before Gill's arrival. Kirk's corrective interference resulted in the overthrow of the planetary government Gill had installed and allowed for a return to such peace.