In the mirror universe, Black Jack Crusher was a notorious Terran pirate. In 2359, he tried to plunder treasures from the ghost planet Iconia in his ship, the Bonny Beverly. The Beverly was destroyed by a warp core explosion after an encounter with an Iconian probe; Jack died in the explosion. Jean-Luc Picard studied logs from the Bonny Beverly before making his own expedition to Iconia in 2371. (TNG - Mirror Universe novella: The Worst of Both Worlds)