Star Trek: The Animated Series were added to the cast—claiming that Sulu and Uhura were of importance as they were proof of the ethnic diversity of the 23rd century and should not be recast. Nimoy also took this stand as a matter of principle, as he knew of the financial troubles many of his "Star Trek" co-stars were facing after cancellation of the series. Koenig was not forgotten, and later wrote an episode for the series, becoming the first "Star Trek" actor to write a "Star Trek" story. Koenig wrote "The Infinite Vulcan", which had plot elements from the original "Star Trek" episode "Space Seed"
Star Trek: The Next Generation (two boxed sets per season), and as with the US releases were in the NTSC format and ordered by production code. The European laserdiscs were released in the PAL format and included the ten two-part telemovies as well as a disc featuring the episodes "Yesterday's Enterprise" and "Cause And Effect". The pilot episode, "Encounter At Farpoint", was also included in a boxed set called "Star Trek: The Pilots" featuring the pilot episodes from "Star Trek: The Original Series", "Star Trek: The Next Generation", "Star Trek: Deep Space Nine", and "Star Trek: Voyager". The first season of the series was released