10 Star Trek Episodes That Paid Off WAY Later
7. The Price
The Price introduces several elements to the franchise, including the Barzan race and their Wormhole, the Delta Quadrant and its extreme distance, and of course the characters of Arridor and Kol. The episode itself is relatively light fare, appearing somewhat as a love story for Deanna Troi more than anything. However, this episode would have far-reaching ramifications for the franchise.
For example, Arridor and Kol are stranded in the Delta Quadrant by the episode's end. Star Trek: Voyager would pick up on this storyline in their third season episode False Profits. Actor Dan Shor returned as Arridor, though Kol was recast, now played by Leslie Jordan. The episode establishes the Ferengi as false gods on a pre-warp planet, using their advanced technology to gain power.
However, that is not the only element from The Price to come back. Star Trek: Discovery, in its second season, introduced the character of Nahn, a Barzan security officer serving aboard the Enterprise, and later the Discovery. This informs us that not only had first contact between the Federation and Barzan people occurred more than 100 years before the events of The Price, but that Nahn must have impressed someone at Starfleet, as she would have needed sponsorship to gain entry to the Academy. Barzan was not a member world by The Price.