Numerous undeveloped Star Trek episodes were written for Star Trek: The Animated Series. These stories were submitted or developed for production but, for various reasons, never aired. In late 1969 , three story outlines were suggested by Don Christensen, while the series was imagined as involving some specifically educational material in each episode and being set aboard the training ship Excalibur, where each of the main characters would have a similar-looking child counterpart. An analysis of the outlines was included in a three-page memo that, on 15 October 1969 , was sent from Philip Mayer (director of Special programming for Paramount) to Filmation co-founder Lou Scheimer. One of Mayer's comments was: "I think as long as we're only doing three outlines, each one of them should be spe