When Kai Opaka makes an unscheduled visit to DS9, Commander Sisko, Major Kira and Dr. Bashir take her off the station as soon as possible. But when their Winnebago crashes onto “Planet War,” one of them will be unable to leave. Do humans in the 24th century have super eyesight? Does the promenade have a Claire’s? What’s the greatest amount of emotion depicted in Star Trek? It’s the episode that’s grandfathered into immortality.