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 in various Star Trek series. In addition to working with his brother, John Jefferies, to create the hand-held phaser weapons of "Star Trek", Jefferies also developed the set design for the bridge of the "Enterprise" (which was based on an earlier design by Pato Guzman). Jefferies used his practical experience as an airman during World War II and his knowledge of aircraft design to devise a sleek, functional and ergonomic bridge layout. The costume designer for "Star Trek", Bill Theiss, created the striking look of the Starfleet uniforms for the "Enterprise", the costumes for female guest stars, and for various