Star Trek.com has a nice memorial write up on recently passed Harlan Ellison:

StarTrek.com is saddened to report the passing of Sci-Fi and Star Trek legend Harlan Ellison. Ellison, who turned 84 just last month, died this morning, June 28, at his home in California, according to his wife, Susan. Ellison wrote countless books, novellas, short stories, scripts, think pieces and more, and he won every imaginable genre writing prize, including multiple Bram Stoker Awards, Hugo Awards, and Writers Guild of America Awards. His most-significant Star Trek contribution was, of course, his teleplay for the TOS episode, “The City on the Edge of Forever.”