Re: In A Mirror, Darkly: Best cold open ever?
It's a wonderful episode just for the sake of being an over the top romp, as it was intended. But I think the Constitution-class Defiant and recreated sets have a lot to do with its success and popularity. The episode is obviously a labor of love from many people, and it must have been depressing when news of series cancellation finally came in the middle of onstage filming. The fourth season dvd set has a featurette on the episode.
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)