A is for Atavachron. A temporal portal. B is for the Beltane star system. C is for Compressed teryon beam. D is for the Duras sisters, Lursa and B'Etor. Just as dangerous as if not moreso than their late brother. E is for Elasian females. Real fun on dates. Just don't let them pull their famous crying stunt on you. F is for the Fabrini Oracle, the computerized - and authoritarian - ruler of the Fabrini people of Yonada during part of their journey through interstellar space. G is for Guinan who works in Ten Forward.