April 6, 1967 –

The Star Trek episode The City on the Edge of Forever premiered on this date. It has been considered the best episode of the series by fans, critics, and crew alike.
Gene Roddenberry apparently denied Harlan Ellison’s pseudonym request because he knew everyone in the science fiction community was aware that the “Cordwainer Bird” credit was Ellison’s way of signaling his dissatisfaction with the way production people treated what he wrote. It would have meant that Star Trek was no different than all the other “science fiction” shows in mistreating quality writers, and could have resulted in prose science fiction writers avoiding contributing to the program.
