A is for Azetbur; Chancellor Gorkon's daughter
B is for Brigadier Kerla
C is for Camp Khitomer, near the Romulan border
D is for DeForest Kelley. This was his last on-screen movie appearance.
E is for Excelsior, USS. warping to the rescue.
F is for Fire, which the big burly alien with the genitals on his kneecaps knocks Kirk into during their brawl on Rura Penthe.