Note: please avoid personal examples, anecdotes and natter. Feel free to tell us about how scary the Borg are, but we don't need to know how they made you hide under the bed.
- Star Trek: The Original Series
- Star Trek: The Next Generation
- Star Trek: Deep Space Nine
- Star Trek: Voyager
- Star Trek: Enterprise
- Star Trek: Discovery
- Star Trek: Picard
- Star Trek: Lower Decks
- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek VI: The Undiscovered Country
- Star Trek: Generations
- Star Trek: First Contact
- Star Trek (2009 film)
- Star Trek Into Darkness
- Star Trek Beyond
- Any time a Captain's Log entry is prefixed with "Stardate: Unknown" or something else along those lines, you know the crew is in dire straits, usually in the form of being cut off from the rest of galactic civlization for a lengthy period of time or a Negative Space Wedgie.
- The Transporter maps your body by tearing you apart, right down to the last atom and then constructing a copy of you at the destination. So, you die every time you go through the transporter. The copy has your body and your memories, and as far as everyone else is concerned, it's you. But it's not. Interestingly enough, this was the topic of the opening chapter of the very first Star Trek novel, Spock Must Die! by James Blish, who wrote the novelizations for the original series.
- Star Trek V: The Final Frontier: The jerkass Energy Being with near-divine powers that was thrown in as its Big Bad. That nearly killed Kirk. Then we have its Villainous Breakdown...
- Energy Being: YOOOOOOOOOOOOOOOOOOOOOOOOOOOUUUUUUUUUHHHHHHHHHH!!!!!!
- Star Trek: Insurrection. The flesh stretching process of the Son'a. Only somewhat Nightmare Fuel until head baddie Ru'afo betrays Admiral Dougherty, killing him by subjecting him to a flesh stretching machine. Ow.
- "Blood and Fire" is about Regulan bloodworms. The ones the Klingons were joking about in "The Trouble with Tribbles". Regulan bloodworms are not funny. Or cute. Or harmless and useful, like the ones in Enterprise. Point of fact, they travel in gigantic swarms, and they eat people alive, and we get to see it.
- Even the Klingons are clearly terrified of them.