A feared band of part-alien, part-human scavengers in the 32nd century, notorious for cannibalism and for killing their hostages even when ransom demands have been met.
The Furies appear in the Starfleet Academy episode Come, Let's Away. Dressed in black and communicating in insect-like screeches, they are regarded as a scourge of the post-Burn galaxy. The name is borrowed from the 1990s Invasion! series of Star Trek novels.
During a training exercise aboard the derelict USS Miyazaki, a cloaked Fury ship reveals itself and its crew takes a team of cadets hostage, demanding a ransom from the Federation and throwing Lieutenant Tomov out of an airlock. The pirate Nus Braka, who once drove the Furies off with a sonic weapon, is consulted for help.
It is a trap. The Furies are working with Braka and the Venari Ral, whose ship disables the USS Sargasso and loots the station it guarded. Tarima Sadal's telepathic attack lets the cadets be beamed to the Athena, though the cadet B'Avi dies protecting Caleb.