When Starfleet officers turn up dead on DS9, Captain Sisko is surprised their deaths aren’t war-related. But when Ezri Dax goes for a post-graduate minor, it’ll be a major problem for a killer on the loose. Is anything off-limits in a “if there’s anything I can do” reciprocation? Why don’t weapons designers consider asymmetrical eye-puffiness? Is this what inspired CSI? It’s the episode that never sleeps!