Star Wars: The Clone Wars/Nightmare Fuel

• The episode "Lair of Grevious" had a much darker tone compared to others.
  • The very nasty fight with Grevious that has the Jedi chopping his legs off, while he crawls on the ceiling.
  • A clone trooper getting incinerated in a lava pit, ala Temple of Doom.
  • Grevious' horrifying "pet" which mauls another clone trooper to death.
  • Grievous' droid doctor telling him that there may be "some discomfort" and then beginning to cut open his head as he screams in agony.
• In "Cargo of Doom", there's a scene where Cad Bane tortures a Jedi using electricity. The entire sequence - Bane's coldness, the Jedi's death, complete with tongue sticking out, and what really sealed it was the emotionless battle droids.
• The scene in "Children of the Force" where Obi-Wan, Anakin, and Mace try to gain information from Cad Bane by using a Jedi Mind Trick on him, all at the same time. It's pretty creepy to watch the cold, calculating bounty hunter thrash in obvious agony as they assault his mind, with the Jedi knowing full well it could destroy him both mentally and physically.
• The clones getting their escape pods cracked by the nonchalant droids... humming a jaunty tune.
• The spider assassin-droid in "Voyage of Temptation". Imagine a giant metal spider with dozens of glowing red eyes, and it's trying to kill you. Now imagine that when you kill it, it starts spewing out dozens of little metal spiders, also trying to kill you.
• Geonosian parasites, especially when controlling dead Geonosians.
  • One of the Geonosians pulls out a mind-control worm and shows it to Luminara. Anakin wishes to free her, but Obi-Wan tells him to wait it out. The Geonosian then puts the worm on Luminara's face and Obi-Wan is still waiting to see how the worm will enter her head.
• At the start of "Brain Invaders", the first worm enters a clone and his eyes roll back into his head as the worm starts taking over.
  • The scene where Barris watches a bunch of infected clones force a brain worm up another clone's nose. It gave a whole new meaning to Mind Rape.
  • Ahsoka's lightsaber duel with the worm-possessed Barris, who at one point screams at Ahsoka with the worm coming out of her mouth like a long, snake-like tongue.
• The Son from the Mortis arc, who's basically the Dark Side incarnate. He also sounds like Emperor Palpatine at times.
  • From the same arc, Anakin's vision of his future was horrifying. He's basically watching himself butcher innocent children, fatally throttle his beloved wife, attempt to murder his best friend, and be party to the destruction of a planet and the genocide of billions of innocent people, all while being unable to stop the visions. Forget turning to the dark side, he's lucky he didn't go insane from the experience.
    • And the worst part? There's nothing in those visions that he cannot prevent.
  • Ahoska after the Son brainwashes her into becoming his dark side servant in "Altar of Mortis".
• The torture scene in "The Citadel" deserves mention, especially those six words said by the torture droid as it reached for Even Piell's eye; "Say goodbye to your good eye." Brr...
• Exploding Gungans, Mon Cala and Quarren, courtesy of Riff Tamson's knife bombs. It gets even more gruesome when Lee-Char blows Tamson to bits with one of the shark-man's own bombs. We not only see blood onscreen, but also some of Tamson's remains, including his head, sink to the bottom of the sea.
• Almost everything from "Massacre", including Mother Talzin's Cold-Blooded Torture of Dooku via voodoo doll and Nightsister zombies.
• Darth Maul. He's become a psychotic, deranged lunatic, skittering around on a spider-like contraption, ranting dementedly. If possible, his single moment of sanity at the end of his first appearance is even worse; an unblinking, yellow-eyed Death Glare, showing that beneath his insanity, Maul is still a vicious predator, obsessed with revenge.

Darth Maul: Revenge... I must have revenge...

• • He's laughing and sobbing at random intervals between broken ramblings interspersed with coherent phrases about revenge, and there's the implication that he is fully aware of his broken mental state.

Darth Maul: The chains... The chains are the easy part. It's what goes on in here that's hard [taps head, begins to sob].

• While it's not shown on screen, it's implied that Maul killed a bunch of kids in Revenge.