Kryptonite

red kryptonitegold kryptoniteblue kryptonitegreen kryptoniteblack kryptonitegreen stoneSilver KryptoniteAbdulchiptoniteChurch, Mindy
Kryptonite is a material that appears primarily in Superman stories.wikipedia
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Dorothy Woolfolk

Dorothy Roubicek WoolfolkDorothy Woolfolk Roubicek
Editor Dorothy Woolfolk stated in an interview with Florida Today in August 1993, that she "felt Superman's invulnerability was boring."
As an editor at DC Comics, one of the two largest companies in the field, during the 1940s period historians and fans call the Golden Age of Comic Books, she is credited with helping to create the fictional metal Kryptonite in the Superman mythos.

Brainiac (character)

BrainiacBrainiac 13Brainiac-13
Brainiac's next present-day appearance is in Action Comics #275 (April 1961), which shows the villain planning to defeat Superman by exposing him to both red and green kryptonite, giving Superman a third eye on the back of his head, forcing him to wear various hats to hide it. Superman soon defeats Brainiac and sends him off into the distant past.

Streaky the Supercat

StreakyPositive ManWhizzy
One of a series of super-powered animals including Krypto the Superdog, Comet the Superhorse, and Beppo the Supermonkey that was popular in DC's comics of the 1960s, Streaky was Supergirl's pet cat that was given super-powers by an unusual form of kryptonite.

Lex Luthor

LuthorLexPresident Luthor
The teenage Luthor saves Superboy from a chance encounter with kryptonite.

Krypton (comics)

KryptonKryptonianKryptonians
It was a mineral from the planet Krypton that drained Superman of his strength while giving superhuman powers to mortals.
Argo City drifted through space on an asteroid-sized fragment of Krypton, which had been transformed into kryptonite by the explosion.

The Adventures of Superman (radio series)

The Adventures of SupermanSupermanradio show
The mineral known as kryptonite was introduced in the radio serial The Adventures of Superman, in the story "The Meteor from Krypton", broadcast in June 1943.
This serial introduced the fictional mineral kryptonite, the radiation from which can weaken and even (in some continuities) kill Superman.

Ultraman (comics)

UltramanClark Kent, Lt.Clark Luthor/Ultraman
In Justice League: Crisis on Two Earths (2010) an alternate universe version of Lex Luthor uses blue kryptonite against the villain Ultraman.
Unlike Superman, the Earth-Three Ultraman gets stronger every time he is exposed to kryptonite, originally developing a completely new superpower with each new exposure.

Superman/Batman

Batman/SupermanSuperman/Batman AnnualSuperman/Batman: Public Enemies
In the first story arc, "The World's Finest", also referred to as "Public Enemies" (issues #1–6, illustrated by Ed McGuinness), then-U.S. President Lex Luthor declares Superman and Batman enemies of the state, claiming that a Kryptonite asteroid headed for Earth is connected to an evil plot by Superman.

Superman

Kal-ElClark KentClark Kent / Superman
Kryptonite is a material that appears primarily in Superman stories.
Elements such as Bizarro, Supergirl, the Phantom Zone, the Fortress of Solitude, alternate varieties of kryptonite, robot doppelgangers, and Krypto were introduced during this era.

Metallo

John CorbenEmmet ValeJohn Corben / Metallo
In Justice League: Doom (2012), the villain Metallo wounds Superman with a kryptonite bullet, but he is saved by the JLA.
Metallo is depicted as a cyborg with a kryptonite power source, which he uses as a weapon against Superman.

Bizarro

a clone of ClarkBizarro ComicsBizarro Superman
Superboy is eventually forced to "kill" the "less than perfect" clone, using the remains of the duplicating machine, which acts like blue kryptonite (as opposed to green kryptonite, Superboy's weakness) on the copy.

Smallville

Smallville Season 11season 11 comicsSmalliville
Smallville (2001-2011) featured kryptonite on a regular basis. A large quantity of the green variety descends to Earth in a meteor shower, arriving in the town of Smallville, Kansas with the spaceship containing the infant Kal-El. The material is colloquially referred to by Smallville residents as "meteor rock", but is eventually called "kryptonite" by Clark Kent once he discovers his origins in season two episode "Rosetta" (in real life, the area near Brenham, Kansas is known as the site of a major meteorite strike between 10,000 and 20,000 years ago). Aside from being harmful to Clark Kent, the mineral produces bizarre changes in flora and fauna. It also occasionally bestows metahuman abilities on humans depending on the circumstances of their exposure to it, such as a girl treated for a rare bone disease acquiring shapeshifting powers. These people are commonly known by the inhabitants of Smallville as "Meteor Freaks". The green variety of the mineral appears in several episodes every season, although other varieties appear, including: red in "Red" (2002), "Exodus", "Exile", "Phoenix" (2003), "Unsafe" (2005), "Crimson" (2007) and "Upgrade" (2010); black, formed when superheating green kryptonite in "Crusade" (2004) and "Doomsday" (2009); silver in "Splinter" (2005); blue in "Blue" (2007), "Persona" (2008), "Kandor" (2009), "Salvation" (2010) and "Harvest" (2011); as a gem in "Persuasion" (2010) and gold in "Prophecy" and "Finale" (2011). Smallville was the first appearance of a black kryptonite that would split a person into their good and evil halves, before later being brought into the comic canon in Supergirl (vol. 5) #2 (Oct. 2005).
The regular cast is introduced in season one, with storylines involving a villain deriving power from kryptonite exposure.

Supergirl

Kara KentDick MalverneKara
Created as a female counterpart to Superman, Kara Zor-El shares his super powers and vulnerability to Kryptonite.

Julius Schwartz

Julius "Julie" SchwartzCarmine InfantinoInfantino, Carmin
This tale was recounted by Julius Schwartz in his memoir.
This included an attempt to scale back Superman's powers while removing kryptonite as an overused plot device.

Supergirl (Kara Zor-El)

SupergirlKara Zor-ElKara
Although Argo, which had survived the explosion of the planet, drifted through space as a self-sustaining environment, the soil of the colony eventually turned into Kryptonite; and though Kara's father Zor-El placed lead sheeting above the ground to protect the citizens from radiation, meteorites pierced the sheeting, and the Kryptonians died of radiation poisoning instead of replacing the metal.

The K-Metal from Krypton

An unpublished 1940 story titled "The K-Metal from Krypton", written by Superman creator Jerry Siegel, featured a prototype of kryptonite.
This storyline features the precursor to Kryptonite called "K-Metal" and Lois learning that Clark Kent is Superman.

Nevertheless, She Persisted (Supergirl)

Nevertheless, She Persisted
Supergirl (2015–present) featured green kryptonite in the episodes: "Pilot", "Stronger Together", "Hostile Takeover", "For the Girl Who Has Everything", and "Distant Sun". In the second part of Arrowverse's 2017 crossover "Crisis on Earth-X," reveals that Green Arrow of Earth-1 somehow obtains samples of green kryptonite, and uses them to construct kryptonite arrows as deterrents against rogue Kryptonians such as Overgirl (Supergirl's parallel universe counterpart from Krypton-X) and Superman imposter John Deegan (on 2018 crossover "Elseworlds"). DEO manages to synthesize and create blue kryptonite which is featured in the episode "Bizarro". The red kryptonite is featured in the episode "Falling" as a failed attempt to recreate green kryptonite by Maxwell Lord. Silver kryptonite is featured in the episode "Nevertheless, She Persisted". In season 3, the black kryptonite is pivotal to its arc, first appearing in the episode "The Fanatical", in which it is being referred to as Harun-El by Kryptonians. The Worldkiller Coven from Krypton, headed by dark priestess Selena, schemes to use the Harun-El to terraform Earth into a Krypton-like planet for Kryptonians to inhabit. The protagonists uses the Harun-El to split the Worldkiller Coven's servant, Reign, from her human alter-ego Samantha Arias. By the end of the season finale, it is implied that Supergirl's being is also divided after her exposure to it during her final battle with Reign.
Supergirl fights Superman, who hallucinates that she is General Zod due to Rhea's silver Kryptonite.

General Zod

ZodGeneral Dru-ZodMajor Zod
Acknowledging that he could neither afford to leave them on the now-dead pocket Earth to let them die on their own nor imprison them on his world, Superman was forced to execute them with Green Kryptonite.

Phantom Zone

Ghost ZoneAz-RelBal-Gra
Az-Rel - Az-Rel was a petty criminal from Bokos, the Island of Thieves. He possessed pyrotic powers. His partner, Nadira, possessed psychokinetic powers. Together they robbed helpless victims in Erkol, the oldest city of Krypton. Both were captured and sentenced to 15 Kryptonian sun-cycles (20.55 Earth years) in the Phantom Zone. The two criminals were among those freed from the Zone when Quex-Ul was manipulated into building and activating a crude Phantom Zone Projector. Later, Nadira was killed when the dying Jer-Em exposed her to green kryptonite. In her dying agony, Nadira telekinetically inflicted pain on Az-Rel, which unleashed his pyrokinesis upon himself, incinerating him.

Smallville (comics)

SmallvilleSmallville, Kansas Smallville
Smallville (2001-2011) featured kryptonite on a regular basis. A large quantity of the green variety descends to Earth in a meteor shower, arriving in the town of Smallville, Kansas with the spaceship containing the infant Kal-El. The material is colloquially referred to by Smallville residents as "meteor rock", but is eventually called "kryptonite" by Clark Kent once he discovers his origins in season two episode "Rosetta" (in real life, the area near Brenham, Kansas is known as the site of a major meteorite strike between 10,000 and 20,000 years ago). Aside from being harmful to Clark Kent, the mineral produces bizarre changes in flora and fauna. It also occasionally bestows metahuman abilities on humans depending on the circumstances of their exposure to it, such as a girl treated for a rare bone disease acquiring shapeshifting powers. These people are commonly known by the inhabitants of Smallville as "Meteor Freaks". The green variety of the mineral appears in several episodes every season, although other varieties appear, including: red in "Red" (2002), "Exodus", "Exile", "Phoenix" (2003), "Unsafe" (2005), "Crimson" (2007) and "Upgrade" (2010); black, formed when superheating green kryptonite in "Crusade" (2004) and "Doomsday" (2009); silver in "Splinter" (2005); blue in "Blue" (2007), "Persona" (2008), "Kandor" (2009), "Salvation" (2010) and "Harvest" (2011); as a gem in "Persuasion" (2010) and gold in "Prophecy" and "Finale" (2011). Smallville was the first appearance of a black kryptonite that would split a person into their good and evil halves, before later being brought into the comic canon in Supergirl (vol. 5) #2 (Oct. 2005).
Later, Smallville was retconned to have a violent history, with green kryptonite, a common substance in the area, having a mutating, dangerous effect on normal citizens of the town (similar to the TV show Smallville). This history, plus the near-destruction and reconstruction of the town by overzealous government forces, is explored in the storyline "The Search For Kryptonite."

Superman III

IIIRoss Websterthird installment
In Superman III (1983) billionaire Ross Webster (Robert Vaughn) orders the creation of synthetic kryptonite. Computer programmer Gus Gorman (Richard Pryor) uses tar to compensate for an unknown component of kryptonite, causing the newly created mineral to eventually turn Superman evil and split the hero into two beings. Gorman's "supercomputer" later fights Superman and uses a kryptonite ray.
Ross orders Gus to use his computer knowledge to create Kryptonite, remembering an interview with Superman.

Lois & Clark: The New Adventures of Superman

Lois & ClarkThe New Adventures of SupermanLois and Clark
Lois & Clark: The New Adventures of Superman (1993-1997) featured green kryptonite in the episodes "The Green, Green Glow of Home", "Barbarians at the Planet", "The House of Luthor", "Metallo", "Top Copy" and "Battleground Earth". The red variety was featured in the episodes "Individual Responsibility", "Ultrawoman" and "Lethal Weapon".
Luthor sees Superman as a worthy opponent; he ultimately discovers his weakness to kryptonite and realizes he has a secret identity, vowing to learn it in hopes of making the hero's life difficult.

Adventures of Superman (TV series)

Adventures of SupermanThe Adventures of SupermanSuperman
The Adventures of Superman (1952-1958) featured kryptonite in the episodes "Panic in the Sky", "The Defeat of Superman", "Superman Week", "The Deadly Rock", "The Magic Secret", "The Gentle Monster" and "All That Glitters".
Scripts for the sixth and final season reestablished a bit of the seriousness of the show, often utilizing science fiction features like a Kryptonite-powered robot, atomic explosions, and impregnable metal cubes.

Doctor Destiny

John DeeganDestinyDr. John Deegan
Supergirl (2015–present) featured green kryptonite in the episodes: "Pilot", "Stronger Together", "Hostile Takeover", "For the Girl Who Has Everything", and "Distant Sun". In the second part of Arrowverse's 2017 crossover "Crisis on Earth-X," reveals that Green Arrow of Earth-1 somehow obtains samples of green kryptonite, and uses them to construct kryptonite arrows as deterrents against rogue Kryptonians such as Overgirl (Supergirl's parallel universe counterpart from Krypton-X) and Superman imposter John Deegan (on 2018 crossover "Elseworlds"). DEO manages to synthesize and create blue kryptonite which is featured in the episode "Bizarro". The red kryptonite is featured in the episode "Falling" as a failed attempt to recreate green kryptonite by Maxwell Lord. Silver kryptonite is featured in the episode "Nevertheless, She Persisted". In season 3, the black kryptonite is pivotal to its arc, first appearing in the episode "The Fanatical", in which it is being referred to as Harun-El by Kryptonians. The Worldkiller Coven from Krypton, headed by dark priestess Selena, schemes to use the Harun-El to terraform Earth into a Krypton-like planet for Kryptonians to inhabit. The protagonists uses the Harun-El to split the Worldkiller Coven's servant, Reign, from her human alter-ego Samantha Arias. By the end of the season finale, it is implied that Supergirl's being is also divided after her exposure to it during her final battle with Reign.
The League was captured by his will-deadening beam, that also had kryptonite as an element.

Achilles' heel

achilles heelAchillesheel
Due to Superman's popularity kryptonite has become a byword for an extraordinary weakness, synonymous with "Achilles' heel".
Kryptonite