[[caption-width-right:319:Poster by [[http://harnois75.deviantart.com/ Harnois75]]]]

''Island of Terror'' is a 1966 British SciFiHorror film starring Creator/PeterCushing, released by Planet Films and directed by stalwart British filmmaker Terrence Fisher.

On the remote Petrie's Island, farmer Ian Bellows goes missing while walking home through the woods one night. His concerned wife goes to the locate constabulary, whereupon Constable John Harris heads out to locate the wayward farmer... only to discover him dead in a cave with his skeleton having been [[{{Squick}} completely liquefied]] and sucked out. At his wit's end, town doctor Reginald Landers journeys to UsefulNotes/{{London}} to seek the assistance of his old friend, pathologist Brian Stanley (Cushing), fearful that a bizarre new bone-dissolving disease is running rampant on Petrie.

Along with Stanley's hunky bone expert colleague David West and West's rich girlfriend Toni Merrill, the gang travels to the island to investigate further, discovering that the sudden epidemic of boneless people and animals might in some way be connected to the work of reclusive cancer doctor Lawrence Phillips, who has set up shop in the island's requisite creepy Victorian-era mansion. As it turns out, Phillips and his assistants are all dead, and just as boneless as Ian Bellows.

The gang quickly realizes that Phillips' efforts to cure cancer have led to the creation of nigh-unstoppable silicon-based organisms called "Silicates" which live by eating bone matter, and soon Stanley, West and Toni are in race against time to find a means of destroying them before they overrun the entire island and kill everyone.

Not related to ''Webcomic/TerrorIsland''.
!!Tropes used in this film:
* AnAxeToGrind: Dr. Landers tries to use a fire axe to defend against a Silicate. [[spoiler:It doesn't work.]] West later has to use the same axe to [[spoiler:cut off Stanley's ensnared hand to save him.]]
* AnyoneCanDie: [[spoiler:Dr. Landers, a main character for the first half of the film (to the point where he's almost a DecoyProtagonist), dies at about the middle mark. Stanley himself ''almost'' falls prey to this trope, but some quick thinking on West's part (and an axe) saves 'im.]]
* ApocalypticLog: Dr. Phillips' notes.
* AttackOfTheMonsterAppendage: Type 2 example. When Constable Harris enters the test animal room, a green tentacle drops down from the ceiling and grabs him. Later, the same tentacle shoots out to try and grab the main characters, and, failing, the full creature emerges into view, giving us our first Silicate.
* BodyHorror: All those boneless corpses.
* ChekhovsClassroom: The seemingly innocuous conversation Phillips and his assistant have at the beginning.
** Ditto Phillips' notes, which mention both the missing Great Dane and the fact it got an accidental dose of Strontium-90. The scene of the main characters discussing all of this is very brief, however, so if you don't pay attention you're liable to wonder about the significance of the dead dog Dunley finds. Fortunately, Stanley is there to remind us.
* ChekhovsGun: The axe in the mansion. It's glimpsed a few times before Landers uses it in a failed attempt to kill a Silicate.
** ChekhovsBoomerang: After Stanley leaves the axe by the front door, it's forgotten about [[spoiler:until West needs to use it to cut off Stanley's hand to save him.]]
* ChekhovMIA: The missing dog alluded to in Phillips' notes. Also doubles as ChekhovsClassroom since it's only mentioned when West and Stanley are going over the notes.
* ClosedCircle: Not only are they on an island, but a boat only comes ''once a week'' and the helicopter that flew them there has to leave early on.
* CombatTentacles
* CuriosityKilledTheCast: Several characters just ''have'' to go and see what that weird noise is.
* DangerousWindows
* DarknessEqualsDeath: Which is why Stanley turns the lights on!
* DeadpanSnarker: Stanley.
* DirtyCoward: Halsey.
* DiscretionShot: Used whenever the Silicates suck out people's bones, mostly because they didn't have the budget to show it. The could show the ''aftermath'', however... ick.
** Ditto the scene where [[spoiler:Stanley's]] hand is hacked off, but only in the original British version. The American [[IncrediblyLamePun cut]] (ha) adds an insert of the hand getting hacked off, complete with splurting blood.
* TheEndOrIsIt: [[spoiler:The ending scene involving the Japanese scientist.]]
* EscapedFromTheLab: The Silicates busted free from their tanks in Dr. Phillips' lab.
* {{Foreshadowing}}: The opening scene has Phillips' assistant Carson asking if they should wait for the teams in other countries to coordinate their experiments.
** It's mentioned [[LampshadeHanging early and often]] how the island is pretty much cut off from the rest of the world.
** Also the faulty generator and the flickering lights it causes.
* ForScience
* GettingCrapPastTheRadar: Before the takeoff, our three leads have this... odd discussion:
-->'''Stanley''': What the devil did [[UsefulNotes/NapoleonBonaparte Napoleon]] do on that island of his to keep himself busy?\\
'''West''': He invented solitaire.\\
'''Toni''': [''playful''] I have a much better game in mind.\\
'''Stanley''': [[AThreesomeIsHot Can three play]]?\\
[''West smirks and shakes his head'']\\
'''Stanley''': [''resigned''] [[ADateWithRosiePalms Fascinating game, solitaire]].
** Also:
-->'''West''': [[TheLoinsSleepTonight I may not get places as fast as a Maserati]].\\
'''Toni''': But you do get there eventually.\\
'''West''': Eventually.\\
'''Toni''': When?\\
'''West''': I'll let you know.\\
[''they kiss and the doorbell rings, interrupting them'']\\
'''Toni''': [''slyly''] [[PrematureEjaculation Is that a pit stop or the checkered flag]]?
* GoneHorriblyWrong: [[spoiler:The scientists were looking for a cure for cancer.]]
* ImmuneToBullets: And dynamite. And {{Molotov cocktail}}s. And axes. And... pretty much anything really.
* IslandOfMystery: Petrie's Island. Although during the daytime it's your normal Irish isle, it can be pretty creepy at night...
* HellIsThatNoise: The Silicates' weird electronic warbling.
* HorrorHunger
* LateToTheParty: The helicopter pilot, who drops the main characters off on the island at the beginning, then returns at the end, having missed the entire adventure. He's probably thankful for that.
* LifeOrLimbDecision: See AnyoneCanDie above.
* TheLoad: Toni.
* MadScientist: Averted. Dr. Phillips is a perfectly well-intentioned, albeit careless, scientist working for the betterment of humanity.
* TheMainCharactersDoEverything: West and Stanley more or less take over towards the end, doing all the important stuff, while the ostensible actual head of the island, Campbell, is relegated to a supporting role.
* MyCarHatesMe: Your typical "engine stalls during a monster attack" scenario.
* OfficerOHara: Constable Harris has some traits of this. It's okay, though, since the movie ''is'' set in UsefulNotes/{{Ireland}}, after all.
* OurMonstersAreWeird: The Silicates.
* PhlebotinumMuncher
* PickyPeopleEater
* ReasonableAuthorityFigure: Island "boss" Roger Campbell.
* ScreamDiscretionShot: When Ian Bellows wanders into the cave, we don't see what befalls him, just his horrible screaming.
* TheSiege: The heroes find themselves trapped inside the town ball, and later the clinic, besieged by the Silicates.
* SiliconBasedLife: The Silicates.
* SpiritualSuccessor: ''Film/NightOfTheBigHeat'', another Planet Films SciFiHorror production starring Peter Cushing, directed by Terrence Fisher, and set on a remote island. It released a year after this film.
* WhatHappenedToTheMouse: Where did Dunley disappear to during the climax?
* TheXOfY