Aquiel
The two crew members of a Federation relay station close to the Klingon border have mysteriously vanished. One of them is the attractive Aquiel Uhnari to whom Geordi has developed some affection after viewing her log entries. She suddenly reappears on a Klingon ship, and she becomes the main suspect, for she didn’t get along with her crewmate Keith Rocha and manipulated the station logs. Beverly, investigating DNA residues from the station, is shocked when a sample assumes the shape of her hand. Rocha was actually killed by a coalescent lifeform that assumed his shape and then killed Aquiel’s dog, Maura. Geordi barely escapes the attack by the dog which is actually the shape-shifting creature. summary by Ex Astris Scientia
Honestly, I don’t remember that episode all that well. One day soon I’m going to see it again and then, I’ll come back and post some more reflections, so stay tuned, everybody.
For now, all I can say is that I think I remember that hand scene. It was a finger, actually, AFAICT. Good one!