An influential {{progressive metal}} band from the UK who combined a very technical, mathcore inspired sound with a melodic and experimental side. They formed in 1999, split up in 2008, and reformed in 2012. They've released two acclaimed albums and three [=EPs=].

In the last few years, the increased popularity of djent has seen them gain a lot of attention due to their undeniable influence on a lot of recent bands, as well as other progressive bands such as Music/ProtestTheHero, who have stated they are their biggest influence.

* Mikee Goodman - Vocals
* Joe Rosser - Vocals
* Dan Weller - Guitar
* Graham "Pin" Pinney - Guitar
* James Leach - Bass
* Dan "Loord" Ford - Drums

* Justin Hill - Vocals

* ''The Trees Are Dead & Dried Out Wait for Something Wild'' (2003)
* ''Death of a Dead Day'' (2006)
* ''Opacities'' (2015)

!!Tropes that apply to [=SikTh=]:
* AlbumTitleDrop: In "Part of the Friction".
--> "Try to make them challenge you. Lights are falling, Death of a day, deader than day. Victory? Victory? Victory? '''Death of a dead day'''."
** Also in "Wait For Something Wild".
* AlternativeMetal
* AnimatedMusicVideo: "How May I Help You?".
* AscendedFanboy: On the poster for Download Festival 2014's line-up, they were placed next to Down: they are huge fans of Phil Anselmo's work.
* TheBandMinusTheFace: Mikee and Justin both left the band. Unable to find new vocalists, they split up soon afterward.
* BasedOnATrueStory: "Philistine Philosophies" is about Mikee's struggles with trying to adapt to the current day music industry. The line "so hop on the wagon or be a mystical tree" was inspired by a conversation he had with his manager where he was told that he needed to have a social media presence or he would be left behind.
* CoolPlane: Sort of. Mikee owns a flying camera which is able to fly at up to 1000 feet into the air. Why? [[RuleOfCool Because it's cool, of course!]]
* CoverVersion: Of Music/NickCave's "Tupelo". Despite being about as far from technical metal as you can get, they hardly changed anything. And it ''works''.
* EpicRocking: Mostly averted. Despite their highly experimental nature, they only have two songs over 7 minutes.
* GaiasVengeance: The video for "Bland Street Bloom".
* LargeHam: The vocals and lyrics in general, even more so on material from the first album.
* LonelyPianoPiece: Both parts of "Emersion".
* LonersAreFreaks: Rod is portrayed this way by everyone he meets in "How May I Help You?". [[spoiler:Even by his girlfriend Miranda, when he finds out what her job ''really'' is]].
* LyricalDissonance: A lot of their songs are fast, furious, and very noisy metal with lyrics that are entirely surreal or just stupid. Averted somewhat in recent years.
* {{Metalcore}}: Often get labeled as this, but it's mostly just the singing.
* ManOfAThousandVoices: Both Mikee Goodman and Joe Rosser. The fact that Mikee is now a voiceover artist fully cements this.
* MetalScream: Plenty of screaming all over the place, some of it downright psychotic.
* MohsScaleOfRockAndMetalHardness: Usually around a solid 9, but they drop to about a 5 or 6 on softer songs, and max out at the 10-11 range in their harder material.
* MrExposition: The bartender in "How May I Help You?". [[spoiler:He reveals that Miranda is a prostitute]].
* NuMetal[=/=]AvantGardeMetal: Frequently associated with the genre, though they are among the most respected.
* OncePerEpisode: A spoken word poem about the environment done in Mikee's strange, intimidating voice.
* ToiletHumour: Rod's revenge method in "How May I Help You".[[spoiler:He puts laxatives into their tea]].
* ProgressiveMetal: Often crossing over into straight-up experimental.
* RedOniBlueOni:
** TheLeader: Mikee and Pin.
** TheLancer: Justin/Joe and Dan.
* SingingSimlish
* SopranoAndGravel: Male example and Mikee and Justin/Joe can play either role.
* SurprisinglyGentleSong: They have a few more melodic songs, but each release has a distinct one: the poppy "Peep Show" from the first album the atmospheric "In This Light" from the second and "Days Are Dreamed" from the Opacities EP.
* SubduedSection: They like this a lot.
* VocalTagTeam: Mikee and Justin are one of the best and possibly most influential examples of this.
* XMeetsY: Best described as Music/{{Korn}} meets Music/TheDillingerEscapePlan meets Music/{{Meshuggah}} meets Music/{{Atheist}}.