Here is the blow-by-blow account of how the most popular ever episode of Star Trek was made, from first draft to final shooting script. David Gerrold, highly accomplished science-fiction script-writer and the creator of "Tribbles", tells the story of the team who cut, change and rewrite; the censors; the people behind the scenes; and the stars themselves. And as well as giving you a rare, insider's view of working on the Star Trek lot, he also reveals with fascinating insight the hows and whys of TV writing.