Film: The Quartermass Xperiment (1955)
Location: Civilized area
Height/Weight: That of an average human before becoming the size of a truck in his last form.
Summary: When aliens threaten the existence of mankind, we don't always need a superhero to save us. Sometimes, we just need a big brain to do it. And fear not, because Dr. Bernard Quatermass has all of that! One of his first forays into the plights of extraterrestrials was no doubt one of the more stranger ones. The enemy? Assimilating fungi.
History: After a rocket crashes into the London countryside, only one of its many crewmembers is found alive. This is Victor Carroon, and he's pretty much an empty husk of his former self. And as time goes by, he begins to show signs that something else is pulling the strings. Indeed, Carroon is the host of a drifting alien spore that assimilates all that its host touches, in the hopes that it may become the ultimate life form. And if Quatermass and pals can't stop it, it's game over for humanity.
Notable Kills: Nothing special.
Final Fate: After achieving its near final form, there is practically nothing left of Carroon. Quatermass and company have no other choice but to electrocute and burn it to death. It's a success.
Powers/Abilities: Carroon can now absorb and assimilate the genetic information from anything he touches, and drastically change form because of it, becoming much stronger along the way.
Weakness: Any heavy artillery will do him in. But it's best to end him as soon as possible.
Scariness Factor: 3.5-Had Quatermass not stepped in just in time, there would be nothing to stop this potential brood of assimilating monsters. With that said, Carroon's final form looks oddly cute for a potential conqueror. Like a puffy octopus-starfish or something.
Trivia: -In the ending of the miniseries this film was based on, Quatermass appealed to what was left of Carroon's consciousness to defeat the alien. Needless to say, original writer Nigel Kneale was not pleased with all the changes the film made.
-Quatermass was played by Brian Donlevy, who claimed that he was in it for the money and nothing else.