First season Trek had a very Twilight Zone, tense, creepy feel throughout. Scariest moments: The faceless woman in "Charlie X" and the salt vampire's first appearance from "Man Trap". As a kid those two moments resulted in a lot of lost sleep over the next few days. Corbomite Manoever too, especially the size of the ship.
Next Gen: "Q Who" and "Conspiracy", yes, but in general, I think NG could depict the Earth overwhelmed with zombies, and it would still be bland.
DS9 probably has a few.
Voyager... "Faces", where Klingon-Torres's Videan abductor has a Voyager crew member's dead face grafted over his... thinking she'll enjoy this! Didn't see that one coming.... Frankly, I was sorry to hear later that she hadn't killed the guy.
Next Gen: "Q Who" and "Conspiracy", yes, but in general, I think NG could depict the Earth overwhelmed with zombies, and it would still be bland.
DS9 probably has a few.
Voyager... "Faces", where Klingon-Torres's Videan abductor has a Voyager crew member's dead face grafted over his... thinking she'll enjoy this! Didn't see that one coming.... Frankly, I was sorry to hear later that she hadn't killed the guy.