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 Original Series second season of "Star Trek: The Next Generation". Guest roles on the series have featured actors such as: In its writing, "Star Trek" is notable as one of the earliest science-fiction TV series to use the services of leading contemporary science fiction writers, such as Robert Bloch, Norman Spinrad, Harlan Ellison, and Theodore Sturgeon, as well as established television writers. Series script editor Dorothy C. Fontana (originally Roddenberry's secretary) played a key role in the success of "Star Trek"—she edited most of the series' scripts and wrote several episodes. Her credits read "D.C. Fontana" at the suggestion of Gene Roddenberry,