MINOR SPOILERS AHEAD! ANYONE YET TO WATCH "A CASE OF CHIAROSCURO" SHOULD PROCEED WITH CAUTION TO AVOID VIOLATING TEMPORAL PRIME DIRECTIVES.
You're on a top-secret mission to recover a lost Federation probe from enemy territory. A close encounter with a Klingon cruiser forces you into hiding on the surface of an alien world, which — thanks, in part, to the local star's radiation making everything appear stylishly monochrome — looks like it's been lifted from a classic 20th-century film noir. You dress up as one of the locals on this occupied world, and quickly learn that you're the spitting image of the leader of the local resistance. What are the chances?