I liked the Crystalline entity episodes, they did follow up on them in the Lit Verse with the Titan books. They named them, the farpoint aliens, and some others as Cosmozoans and they were part of a whole eco system in space. Was a pretty good read.<br/><br/>I always thought a better follow up for it though (the In the Pale Moonlight) was they would use the information to sew descent in the federation, rather then all out war.