The Infinite Vulcan
... that with the Star Trek: The Animated Series episode "The Infinite Vulcan", Walter Koenig became the first Star Trek actor to write for the franchise?
... that with the <i id="mwBBw"><a href="./Star_Trek:_The_Animated_Series" id="mwBB0" rel="mw:WikiLink" title="Star Trek: The Animated Series">Star Trek: The Animated Series</a></i> episode "<b id="mwBB4"><a href="./The_Infinite_Vulcan" id="mwBB8" rel="mw:WikiLink" title="The Infinite Vulcan">The Infinite Vulcan</a></b>", <a href="./Walter_Koenig" id="mwBCA" rel="mw:WikiLink" title="Walter Koenig">Walter Koenig</a> became the first <i id="mwBCE">Star Trek</i> actor to write for the franchise?