Nightmare Fuel / Wolf 359

• Although not as creepy as some later episodes, both "The Empty Man" and "Extreme Danger Bug" definitely are nightmare fuel-ish.
  • The fact that it's an audio medium is really what makes "Extreme Danger Bug" so scary: there's no way of telling how big the spider is.
  • Speaking of early episodes, the echoes of Lovelace's recording in "Super Energy Saver Mode" are really creepy, especially since at that point it's unclear who we're hearing them from.
• The Halloween episode, Time to Kill, definitely qualifies. Especially as we learn later on that the Doppelganger copies include the original memories and personalities, meaning that the Jacobi that died after being locked out of the shuttle during a solar storm died convinced that he was the real Jacobi and the fake was inside with the crew.
• The sound effects on board the Hephaestus in general are pretty creepy. Hisses and creaks, metal groaning, and maybe, maybe, the sound of something in the walls.
• The Dear Listeners themselves are major nightmare fuel. An unknowable, hyperintelligent race of beings that can harness the power of a star for communication, may be immortal, and knows how to create clones that are perfectly accurate down to their personalities.
  • As of "The Watchtower", we now know that They are testing Humanity. Races who have failed the test in the past have been "repurposed." The fact that they don't understand the concept of Death and literally can't grok why humans would be terrified of this possibility makes it even worse.
• Doug at the beginning of "Mayday", screaming his lungs out after being alone in space for who knows how long, listening to nothing but radio static.
• The end of Boléro:
  Kepler: That... is a thing. A thing that is very good at impersonating Captain Lovelace
• When Eiffel returns to Hephaestus after his trip through the dwarf star network, he is welcomed by a unsettlingly calm Minkowski and Mr. Cutter.