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 two [=EPs=]. From 2001, their lineup remained constant.

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 [[ProtestTheHero Protest The Hero]], who have stated they are their biggest influence.

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

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

!!Tropes that apply to SikTh:
* AlternativeMetal
* TheBandMinusTheFace: Mikee and Justin both left the band. Unable to find new vocalists, they split up soon afterward.
* CoverVersion: Of {{Nick Cave}}'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.
* LargeHam: Several of Mikee's voices, especially the one he uses for the poems.
* LonelyPianoPiece: Both parts of "Emersion".
* LyricalDissonance: A lot of their songs are fast, furious, and very noisy metal with lyrics that are entirely surreal or just stupid.
* {{Metalcore}}: Often get labeled as this, but it's mostly just the singing.
* ManOfAThousandVoices: Mikee Goodman is a lesser example - he doesn't do a lot of cleans, but he is more than able to belt out wailing screams akin to BlackMetal, raspy grunts, very fast rapping, scatting, and gurgling HarshVocals typical of DeathMetal.
* MetalScream: Plenty of screaming all over the place, some of it downright psychotic.
* MohsScaleOfRockAndMetalHardness: Usually a solid 9, but they drop to about a 5 or 6 on softer songs.
* 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.
* ProgressiveMetal: Often crossing over into straight-up experimental.
* SingingSimlish
* SopranoAndGravel: Male example, Mikee's deranged screams to Justin's softer, more "emo-ish" singing. On the second album, each of them can play either role.
* SurprisinglyGentleSong: They have a few more melodic songs, but each album has a distinct one: the poppy "Peep Show" from the first album, and the atmospheric "In This Light" from the second.
* SubduedSection: They like this a lot. They'll often have a jazzy, experimental section in a song, such as "Scent of the Obscene".
* XMeetsY: Best described as Music/{{Korn}} meets Music/TheDillingerEscapePlan meets Music/{{Meshuggah}} meets Music/{{Atheist}}.