Red kryptonite made a brief appearance during this era, where it had the effect of rendering Superman permanently powerless.

When Lois Lane unknowingly receives a Red Kryptonite necklace, it causes Superman to turn evil causing Batman and Krypto to hold off Superman until the effects wore off.

In the shooting script for the film ( under the production title " Red Son "), Lex Luthor reveals to a weakened Superman that his henchman actually set Superman up to believe that Krypton still existed by sending false signals.

The villains go on a crime spree and banish the Super Friends to the Phantom Zone but keep Superman on Earth, exposing him to Red Kryptonite which causes him to age quickly.

Several alternate universe versions of the character exist: the Silver Age Bizarro appears in Justice as a member of the Legion of Doom ; one-shot The Superman Monster ( 1999 ), essentially a Frankenstein pastiche features a monstrous copy of Bizarro created by a Viktor Luthor ; one-shot Superman: Red Son ( 2004 ) features a " Superman 2 " created by genius Lex Luthor for the United States to stop the Soviet-based Superman ; and Lex Luthor creates Bizarro-like duplicates called " Liberators " in the limited series JLA: The Nail ( 1998 ).

* Krypto can be seen briefly in the DC Elseworlds story Superman: Red Son in the Fortress of Solitude.

When Superman is turned evil by the Red Kryptonite necklace that was unknowingly given to Lois Lane by Lex Luthor, Krypto teams up with Batman to hold off Superman until the effects of the Red Kryptonite wore off.

Later, Red Tornado is later shown aiding the JLA during their mission into Hell, where he helps Superman defeat the demon Minos.

On occasion, Red Tornado used his high-velocity movement to render himself invisible to unaided human vision and travel at speeds on par with Superman, Power Girl and Green Lantern.

* Red Tornado appears in Mad where he tries to appeal to Superman, Batman, and Wonder Woman about being called " Super Friends.

For example, Superman: Red Son, is a story in which Superman was raised in the Soviet Union instead of the United States.

Although Brainiac 13 was able to gain control of several android superheroes, such as the Red Tornado, Hourman, and the Metal Men, and use them against Superman, Superman discovered during a fight with the Eradicator — attempting to stop the Kryptonian program from ' hi-jacking ' the B13 virus and using it for its own ends — that Brainiac 13 could not cope with Kryptonian technology because he was not compatible with it, giving Superman a plan to stop Brainiac's scheme, tricking Luthor into connecting a Kryptonian battlesuit to one of Brainiac's power conduits and subsequently working with the reactivated Red Tornado to break Brainiac 13 down into his respective nanobots and trap him in the suit.

In a previous episode, the third part of the " Last Son of Krypton " arc, Jonathan " Pa " Kent assures his adoptive son that he will " always be Clark Kent " and that " Superman just helps out every now and then.

Director Bryan Singer stated at the 2006 Comic-Con that he favored the three-persona concept, stating that there was Clark Kent on the farm, the bumbling Metropolis Clark, and Superman, the Last Son of Krypton.

Brandon Routh himself stated, in an HBO First Look interview that he was playing three characters ; Clark Kent, the reporter / farm boy ; Superman, the protagonist and savior of Metropolis ; and Kal-El, the Last Son of Krypton.

In the Elseworlds stories starting with Superman: Last Son of Earth, he is the son of Jonathan Kent, who saves his son from the destruction of the Earth.

" Last Son ", a storyline co-written by Geoff Johns and Superman director Richard Donner, further delves into this version of Krypton which reintroduces General Zod and the Phantom Zone criminals into mainstream continuity.

* In Superman: The Animated Series, " The Last Son of Krypton ", the first part of a three-part pilot episode, depicts Krypton as being basically similar to the pre-Crisis version ( it was scientifically advanced, Kal-El appeared to be about one to two years old as in the Silver Age comics, there are depictions of peculiar animals ) although with elements of the John Byrne version ( such as the appearance of the characters ' wardrobe ).

He wrote two Superman novels, Last Son of Krypton and Miracle Monday.

* The Phantom Zone is first mentioned in the first episode of Superman: The Animated Series, " The Last Son of Krypton, Part 1 ", where Jor-El attempted to convince everyone to enter the Phantom Zone to be saved from Krypton's destruction, and one man would be sent via spaceship to re-establish Krypton's population on a new world.

The character appeared in Action Comics # 785 ( Jan. 2002 ), Infinite Crisis # 1 ( Oct. 2005 ), the Superman: Last Son storyline in Action Comics 844-846 ( Dec. 2006-Feb. 2007 ), 851 ( Aug. 2007 ), # 855-857 ( Oct. 2007-Dec. 2007 ), Annual # 11 ( July 2008 ), and # 873 ( March 2009 ).

Following the 1985-1986 Crisis on Infinite Earths limited series, Superman's history was extensively rewritten, initially eliminating all other survivors of Krypton in the revised version of his origin, including Krypto, so as to once again make the premise that Superman was truly the " Last Son of Krypton " a valid one.

* A robot like Kelex named Krypto appears in the Elseworld story Superman: Last Son of Earth.

* Krypto appeared as a simple puppy on Krypton in the first episode of the 1990s Superman: The Animated Series, " The Last Son of Krypton: Part 1 ", although he is not named. Also of note, in the Superman animated series episode " Bizarro's World ", Bizarro enters the Fortress of Solitude and releases a number of alien animals kept there, including a violent reptilian creature which Bizarro considers to be his " Krypto ", and both became fond of each other.

The Search for Ray Palmer-Red Son features the Ray Palmer of Earth-30, an American captured by the Superman of a communist Russia.

In the 1990s-era Superman: The Animated Series, Jor-El is the main protagonist of Part 1 of the series ' triple-length premiere episode, " The Last Son of Krypton ".

Maggin 1978 novel Superman: Last Son of Krypton, Jor-El is shown as having sent a navigation probe ahead of Kal-El's spaceship, in order to find a suitable foster parent on his new planet.

The introduction of Jerry Siegel and Joe Shuster's Superman in 1938 turned comic books into a major industry, and is the start of the Golden Age of comics.

Not to be confused with Superman supervillain Cyborg Superman, a technopathic entity who prefers cybernetic forms, who is occasionally referred to as merely " The Cyborg.

To deflect suspicion that he is Superman, Clark Kent adopted a largely passive and introverted personality with conservative mannerisms, a higher-pitched voice, and a slight slouch.

This personality is typically described as " mild-mannered ", perhaps most famously by the opening narration of Max Fleischer's Superman animated theatrical shorts.

In the Pre-Crisis comic book title Superman Family, Clark is featured in a series of stories called " The Private Life of Clark Kent ," where he solves problems subtly without changing into Superman.

Adopted by Jonathan and Martha Kent from the Kansas town of Smallville, Clark ( and thus Superman ) was raised with the values of a typical rural American town, including attending the local Methodist Church ( though it is debated by comic fans if Superman is a Methodist ).

Feeling that Clark is the real person and that Clark is not afraid to be himself in his civilian identity, John Byrne has stated in interviews that he took inspiration for this portrayal from the George Reeves version of Superman.

In " Visitor ," Lois finds Superman at the Kent farm with Lana Lang and asks him point-blank if he is Clark Kent.

In the 2009 retcon of the mythos, Lois Lane is fully aware from the beginning, along with Perry White, that the meek, pudgy and bumbling Clark Kent deliberately holds himself back: however, still far from associating him to Superman, they simply believe he's hiding his qualities as a good reporter.

In the current continuity established by DC's " New 52 " relaunch in 2011, Lois Lane remains unaware that Clark is Superman.

In the future of the Legion of Super-Heroes, his secret identity is historical fact, with exhibits at a Superman Museum depicting the hero and his friends and family's adventures.

* The explanation most commonly offered is simply that, despite their physical resemblance, Superman and Clark are perceived as being too different in mannerisms and personality to be the same individual.

A new element that has shown up recently is the fact that most people only know of Clark as a name in a byline, and only see Superman from a distance, if they see him at all.

Since the shorts were produced during the rise of film noir in cinema, the change was usually represented as a stylized sequence: Clark Kent's silhouette is clearly seen behind a closed door's pebble glass window ( or a shadow thrown across a wall ) as he strips to his Superman costume.

The CBS Saturday morning series The New Adventures of Superman produced by Filmation Studios — as well as The Adventures of Superboy from the same animation house — featured the iconic " shirt rip " to reveal the " S " or Clark Kent removing his unbuttoned white dress shirt in a secluded spot, usually thanks to stock animation which was re-used over dozens of episodes, to reveal his costume underneath while uttering his famed line " This is a job for Superman!

Later in the film, when the need to change is more urgent ( as he believes the city is about to be poisoned by Lex Luthor ), he simply jumps out a window of the Daily Planet offices, changing at super-speed as he falls ( the film merely shows the falling Kent blurring into a falling Superman ) and flies off.

A relatively recent debate is which of the two identities ( Superman or Clark Kent ) is the real person and which is the façade.