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 Edge of Forever", respectively. In 1968, "Star Trek" (the T.V. show) won a special Hugo Award for Dramatic Presentation. No episode was named. This was the show's 3rd Hugo Award. In 1967, "Star Trek" was also one of the first television programs to receive an NAACP Image Award. In 1968, "Star Trek"s most critically acclaimed episode, "The City on the Edge of Forever," written by Harlan Ellison, won the prestigious Writers Guild of America Award for Best Original Teleplay, although this was for Ellison's original draft script, and not for the screenplay of the episode as it aired. In 1997,