The diversion of a stellar core fragment threatening the genetically engineered human colony on Moab IV, a rescue which exposed its closed society to outsiders and cost it twenty-three members.
In The Next Generation episode The Masterpiece Society, the Enterprise-D tracks a fragment of a neutron star and finds an unrecorded colony in its path. Sealed in a biosphere for two centuries, its people have been bred and trained so that each exactly fits a role. Their leader Aaron Conor welcomes the visitors; the magistrate Martin Benbeck fears any contact.
Evacuation would destroy the design, so the colony's physicist Hannah Bates comes aboard to work with La Forge. They boost the tractor beam using ideas drawn from his visor, a device made for a man who would never have been born on Moab IV, and nudge the fragment aside.
The damage is done all the same. Bates has seen how far her world has fallen behind and fakes a breach to force an evacuation, then asks for asylum. Twenty-three colonists leave, and Picard wonders whether the rescue did as much harm as the fragment would have.