A is for Animal things that killed Wesley Crusher. He got better.
B is for the Beta Quadrant, one-quarter of the entire Milky Way Galaxy.
C is for Captain Montgomery Scott. Captain of Engineering of the USS Excelsior. But not for very long.
D is for Dathon at El-Adrel.
E is for the Enterprise-D, flagship of the Federation from her commissioning in late 2363 until her destruction at Veridian III eight years later.