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 Animated Series season (16 episodes) was Hal Sutherland and Bill Reed directed the six episodes of season two. All of this series' episodes were novelized by Alan Dean Foster and released in ten volumes under the "Star Trek Logs" banner. Initially, Foster adapted three episodes per book, but later editions saw the half-hour scripts expanded into full, novel-length stories. "Star Trek: The Animated Series" was the only "Star Trek" series not to be produced with a cold open ("teaser"), instead starting directly with the title credits sequence. However, some overseas versions of the original live action series, such as those aired by