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 "The City on the Edge of Forever" was ranked #92 on "TV Guide"s 100 Greatest Episodes of All Time. In 2004 and 2007, "TV Guide" ranked "Star Trek" as the greatest cult show ever. In 2013, "TV Guide" ranked "Star Trek" #12 on their list of the 60 Greatest Shows of All Time. Episodes of the Original Series were among the first television series to be released on the VHS and laserdisc formats in North America in the 1980s, with all episodes eventually being released on both formats. With the advent of DVD in the mid-1990s, single DVDs featuring two