When a strange alien symbiote turns Spider-Man
's suit black, his darkest demons come to light - changing Spider-Man inside as well as out.
This is when a usually good character; or at least a character on the overall side of good
; temporarily switches sides and/or has a temporary drop in morality.
Contrast with Jumping Off the Slippery Slope
and/or Moral Event Horizon
, which are more permanent.
EDITED IN: This has 5 hats, and its definition is clear. All that's left before launching this is to decide on what the title should be.
- While he doesn't quite become a full-blown villain so to speak, Spider-Man shows a semi-villainous side in Spider-Man 3 when the symbiote he has on his suit results in an increase in vengefulness and aggressiveness. He doesn't switch sides; he's fighting against the same enemies as he was immediately before; but his "influenced" side has him doing things he severely regrets and that the series portrays as very clearly wrong.
- My Little Pony: Friendship Is Magic uses this every now and then, typically with mild examples.
- Spike the dragon is normally good, but his envy in ep. 24 at the attention Owlowicious is getting drives him to do some very morally objectionable things, such as planting a fake mouse corpse to try to make it look like Owlowicious killed the mouse. When called out on this, he runs away from home, tries to hide in a cave that happens to belong to another dragon, and then ends up getting saved... by Owlowicious... and then Twilight Sparkle reassures Spike he still has an important place in their social circle, prompting Spike to apologize for what he's done. By the time the next episode rolls around, Spike is pretty much one of the good guys again.
- A more threatening temporary villainy occurs during Secret Of My Excess, when his greedy dragon nature gets out of control. When Rarity, not knowing he is the same Spike, talks about how generous Spike was, he feels ashamed of what he has become and immediately reverts back to his old self.
- Twilight Sparkle has this in "Lesson Zero", when Twilight is driven insane in her rush to find a friendship problem, to the point where she deviously creates one herself. Her Apple of Discord plan, however, goes horribly right.
- Read It And Weep has Rainbow Dash not wanting to admit that she likes reading Daring Do more than she pretends to... so instead of asking her friends if she could borrow their Daring Do books, she tries to steal one from a hospital.
- In the Black Rose duelist arc of Revolutionary Girl Utena, some of the people Utena has to fight are her brainwashed friends.
- Duncan Macleod on Highlander when he has the Dark Quickening.
- In the iOS game Highborn, in Chapter 2, Enzo becomes part of the Decay side for a while after marrying Jessica.
- The EMH on Star Trek: Voyager was reprogrammed to perform unethical-at-best medicine by the Equinox crew.
- Eerie Cuties: Chloe underwent a period of villainy when she donned the Doom Panties prematurely. This caused her crush on Layla's fiance, Dio, along with her feelings of inadequacy, to draw out her Superpowered Evil Side. Thankfully, she got better and is back to her lovable self.
- "Stone Cold" Steve Austin was always an Anti-Hero Villain Protagonist, since he was a face who did heel stuff, but in the InVasion angle he temporarily joined the invading WCW side, which was by definition the "bad" side of the angle. As soon as the angle was over he was back to his old self again.
- Spongebob has barnacle boy switching sides over not getting enough food and respect.
- In Roswell Conspiracies: Aliens, Myths and Legends, this happens to Sh'lainn twice;
- Once when she suffers from an affliction called "the iron death", which causes a banshee to go insane and merge with all the machinery around her after staying away from nature for too long.
- In another episode she's nicked by a vampire, who uses her blood to turn them both into vampire/banshee hybrids she resists when she's asked to drain Nick dry, giving The Alliance time to turn up, knock them out and reverse the process.
- Buffy the Vampire Slayer briefly toys with the dark side a few times. At the opening of season two (induced by trauma) and in a brief arc in season three (induced by Les Yay).
- Willow at the end of season 6 when she becomes Dark Willow and eventually tries to destroy the world. She gets better.
- Charmed has many episodes where one of the Halliwell sisters will go to the Dark Side For A Day before switching back by the end of the episode. A particularly notable one early on has all three sisters turn evil by the end of the episode, only for Leo to save them.
- Also, the episode where Paige does a spell to conjure up a 'Mr. Right' for 24 hrs which inadvertently also produces a 'Mr. Wrong' who she allows to seduce her with his seductive naughtiness.