Cosmic Boy

Cosmic Boy (Rokk Krinn) is a fictional character, a comic book superhero in the 30th and 31st centuries of the DC Comics Universe. He is a founding member of the Legion of Super-Heroes, and was the original leader in all incarnations of the Legion.[1]

Cosmic Boy
Cosmic Boy (Post-Infinite Crisis version)
Cover art for Final Crisis: Legion of Three Worlds #3 (February 2009). Art by George Pérez.
Publication information
PublisherDC Comics
First appearanceAdventure Comics #247 (April 1958)
Created byOtto Binder
Al Plastino
In-story information
Alter egoRokk Krinn
Place of originBraal
Team affiliationsLegion of Super-Heroes
Notable aliasesPolestar, Time Trapper
AbilitiesMagnetism manipulation

Publication history

Cosmic Boy first appeared in Adventure Comics #247 (April 1958) and was created by Otto Binder and Al Plastino.

Fictional character biography


Cosmic Boy is a founding member of the Legion of Super-Heroes, along with Lightning Lad and Saturn Girl, and he has the superhuman ability to generate magnetic fields. Cosmic Boy's brother, Pol, eventually joined the Legion as Magnetic Kid, but died during the "Magic Wars". Cosmic Boy is one of the few Legionnaires ever to have his own miniseries, which ran for four issues in the mid-1980s as a spin-off of the Legends cross-over.

In the pre-Zero Hour Legion, Cosmic Boy was romantically involved with Night Girl (Lydda Jath) from the Legion of Substitute Heroes. During the "Five Year Gap" following the Magic Wars, he lost his powers in the course of a war between the planets of Braal and Imsk (the homeworld of Shrinking Violet), in which the Imskian army used a "dampener" on the magnetic fields within the Braalian soldiers. "Vi" was on the scene when her fellow Legionnaire was crippled by the dampener during the battle of Venado Bay, and harbored deep guilt for years. No longer using his codename, Rokk retired to the slums of a demilitarized Braal with his wife Lydda, who gave birth to their son Pol (named for Rokk's brother).

When Reep Daggle reformed the Legion, a powerless Rokk joined up, moving his family to the Legion's new headquarters. The former Cosmic Boy continued to serve with honor during the adult Legion's tour of duty, proving that he needed no powers to be a hero. Rokk did however regain his powers shortly before Zero Hour, thanks to a special pair of power gauntlets. He took on the codename Polestar, only to renounce the power gauntlets after they began to affect his mind. After learning that he was apparently destined to become the Time Trapper, Rokk and the rest of the Legion were erased from history by Zero Hour.

Post-Zero Hour

In the post-Zero Hour Legion, Rokk Krinn came from a poor family but became a superstar in the Braallian sport of Magnoball, earning the nickname "Cosmic Boy" after winning the Magnoball Cosmic Games. He sent most of his earnings to his family, unaware that his manager, Alex Cuspin, was embezzling them instead. After being approached by R.J. Brande to form the Legion, Saturn Girl discovered and revealed the truth about Cuspin. Rokk promptly dismissed his manager and had him arrested. The founding members voted him leader, but soon after found out that Leviathan, a Science Police veteran, had been appointed to leadership by the United Planets President. Leviathan would shortly thereafter give Cosmic Boy the leadership position after the death of Kid Quantum, a position he served in very admirably.[1] After the attack on Earth by the White Triangle Daxamites, he seemed to turn into a controlling martinet under the thumb of UP President Chu. During this period, he made many unpopular decisions, including forcing his best friend Garth Ranzz and Ultra Boy off the team. However, this was a ruse planned by himself and Invisible Kid to expose the corruption of the UP President.

After this, he voluntarily stepped down from leadership, feeling that he had served as leader for long enough. When Shrinking Violet fell under the influence of the Emerald Eye of Ekron, Rokk was one of the team members the Eye sent to the 21st Century. During this period, he and Saturn Girl began a relationship, but was then rendered comatose during a battle with Doctor Psycho. While he apparently recovered, it was later revealed that Saturn Girl had been subconsciously manipulating his comatose body since Psycho's attack. She also realized that she was in love with Garth. The relationship ended, but the two remained close friends. After returning to the 31st Century, he would deal with an attempt on his life by his former manager, who had been released from prison. After half the team was lost in a rift in space, the Legion was disbanded by Leland McCauley, who had become the president of the United Planets. Brande quickly recruited him to reform the Legion in secret and Rokk again led the team for a short time, discovering that McCauley had been killed and was being impersonated by Ra's al Ghul. After defeating Ra's, Rokk would step down from leadership again. Later, he began a relationship with the Legion's new leader, Kid Quantum II.

"Threeboot" continuity

Cosmic Boy LSH-9
Part of the cover art for Legion of Super-Heroes vol. 5, #9 (October 2005). Art by Barry Kitson.

In Legion of Super-Heroes vol. 5, #1, Cosmic Boy is the leader of the Legion of Super-Heroes. After seemingly destroying the Dominators' homeworld (he actually sends it to the Phantom Zone), Cosmic Boy is voted out of office, being replaced by Supergirl. He then joins a superhero team from the 41st century, who come back in time to offer him membership.

Post-Infinite Crisis

The events of the Infinite Crisis miniseries have apparently restored a close analogue of the pre-Crisis on Infinite Earths Legion to continuity, as seen in "The Lightning Saga" story arc in Justice League of America and Justice Society of America, and in the "Superman and the Legion of Super-Heroes" story arc in Action Comics. Cosmic Boy is included in their number.

Comics writer Geoff Johns stated about the characters:

Cosmic Boy is like the all-around leader who puts it all on his shoulders, but he's magnetic. His powers are all about magnetics, and so it carries over to his personality. And he struggles to bring all the Legion back together. He's like, 'We can do this. We can bring it together.' It comes naturally to him.[2]

Limited series

Cosmic Boy
Cosmic Boy 1
Cosmic Boy #1 (December 1986). Art by Steve Lightle.
Publication information
PublisherDC Comics
Publication dateDecember 1986 – March 1987
No. of issues4
Main character(s)Cosmic Boy
Night Girl
Time Trapper
Creative team
Written byPaul Levitz
Penciller(s)Keith Giffen
Ernie Colón
Bob Smith
Editor(s)Karen Berger

Cosmic Boy was featured in a four-part limited series, cover dated December 1986 through March 1987. A tie-in to the Legends limited series, it was written by Paul Levitz, with art by Keith Giffen, Ernie Colón, and Bob Smith.

In the series, Cosmic Boy and Night Girl have traveled from the 30th century to enjoy a vacation in the 20th century. They find themselves threatened by many citizens and residents of the United States, who have been manipulated by Glorious Godfrey as part of a scheme by Darkseid to discredit Earth's superhero community.[3] Soon after arriving, Cosmic Boy encounters Superman, who does not recognize him—even though Superboy was a member of the Legion for years. He and Night Girl review videotapes of recent history, including references to the bombing of Hiroshima, the explosion of the American space shuttle Challenger, and the meltdown at the Chernobyl nuclear power plant, but no mention of Superman's early career as Superboy. Cosmic Boy, a 20th-century Earth history buff, insists that none of these events are correct. As theirs is one of the first journeys through time since the Crisis, the couple fears that something is terribly wrong with history. The future could be in serious danger, since many of the worlds in the United Planets were colonized by settlers from Earth. A space shuttle mission carrying a satellite crucial to Earth’s future development of space travel goes awry, with the shuttle exploding. Cosmic Boy magnetically catches the payload and sends the debris harmlessly toward the ocean, but American soldiers assume that he is a foreign spy. They attack him, implementing President Ronald Reagan's directive outlawing all superhero activity.

Seeking to protect the satellite, Cosmic Boy and Night Girl travel to NASA facilities in Houston where they meet Jason, one of the astronauts who designed the shuttle. They help to quell a riot that breaks out when demonstrators break down the gates at NASA, and Cosmic Boy becomes convinced that some unseen enemy is deliberately trying to prevent the mission. As they depart, the couple notes that both of their families are from worlds settled during the Great Emigration from Earth. They are unaware that the last name of Jason — the astronaut they just met — is Krinnski... which implies that he may be a distant ancestor of Cosmic Boy, whose real name is Rokk Krinn.

Cosmic Boy and Night Girl decide to return to the 30th century, where time travel experts Brainiac 5 and Circadia Senius might be able to determine the problem. Upon entering the timestream, their Time Bubble encounters a storm and starts to shake violently. They are forced to return to the 20th century. They turn to Jason Krinnski for assistance, who does his best to help them repair the Time Bubble. However, their second attempt to leave fails, as if there was a barrier blocking them. Realizing that they need a massive power source to propel the Bubble all the way to the 30th century, Cosmic Boy harnesses the electromagnetic energy from Earth's magnetic field. They breach the barrier, but are propelled past their own century, all the way to the End of Time, where they are confronted by one of the Legion’s deadliest enemies: the Time Trapper.

The Trapper toys with the couple, giving them an hour to find their way back to the 30th century. They eventually make their way through the Trapper's Citadel to their Time Bubble, just as the last grains in the hourglass are about to fall. Cosmic Boy uses his power to warp the hourglass, closing it so that the last grain will never fall. Amused, the Trapper allows them to leave. He directs the Time Bubble to the 30th century, placing it right in front of Legion Headquarters. However, he warns the couple that this will be their final journey through time, and that "the next occasion when a Legionnaire dares break the time barrier will be the last." As the two of them race to warn the Legion about what has occurred, the Trapper realizes that the Legionnaires will be returning for him. He finds this quite satisfying, as he looks at a pair of statues of Superboy and his dog Krypto.

The events of this series are continued in the story arc "The Greatest Hero of Them All", published in Superman vol. 2, #8; Action Comics #591; and Legion of Super-Heroes vol. 3, #37-38 (August–September 1987).

Powers and abilities

Cosmic Boy's superpower is super-magnetism. He can manipulate, repel or attract metal objects of varying sizes. Naturally, the more metal is in an object the easier it is for him to affect magnetically. Cosmic Boy has been known to pull large iron meteors and satellites down from space with minimal effort. He can use his magnetic power on rocks that contain iron ore to pull or use them as projectiles. He can also magnetize metal objects so that they become magnets themselves and make them stick to other metal objects. His power cannot affect non-metals, such as organic substances like wood or flesh. His control is such that he can manipulate electronic records or the iron in blood. He has been known to use a uniform with ferrous fibres so he can fly with his own powers, but usually relies on a Legion flight ring.


As a member of the Legion of Super-Heroes he is provided a Legion Flight Ring. It allows him to fly and protects him from the vacuum of space and other dangerous environments.


Cosmic Boy's original costume was pink with black at the sides, with four white circles, the code-name "Cosmic Boy" written on the chest, and a plastic bubble space helmet. After his first appearance, the helmet and the codename were replaced with white epaulets. For a period in the late 1970s, he was portrayed in a costume designed by Mike Grell which was essentially a black bustier[4] with black gloves and boots, with bare arms, shoulders, chest, and legs. Cosmic Boy returned to a close variation on the original costume a few years later. As Polestar, he wore a black and purple bodysuit with a stripe up the side and a black cowl. In the post-Zero Hour Legion, he wore a version of his original costume with lavender as the primary color instead of pink. On this version of the costume, the four circles on the chest were actually discs that he could magnetically manipulate and use as weapons. The "Threeboot" version is a similar pattern, with blue as the primary color and black circles instead of white.

In other media


  • Cosmic Boy appears in the Superman: The Animated Series episode titled "New Kids in Town", voiced by Chad Lowe. He appears in Superman's past along with Saturn Girl and Chameleon.
  • Cosmic Boy appeared in an episode of Justice League Unlimited titled "Far From Home".
  • Cosmic Boy was a recurring member of the animated series Legion of Super Heroes, voiced by Wil Wheaton. It reveals that he was the original leader of the Legion. Cosmic Boy appears that he has some romantic feelings for Saturn Girl in the season 1 episode "Chain of Command". He wanted (or ordered) Saturn Girl to stay with him and Brainiac 5 where she would be safe. Saturn Girl angrily objected that she was able to take care of herself. She flies off to help the rest of the teammates before Cosmic Boy tried to apologize. Whether or not they resolved their differences following the mission was never addressed. He loses an election for leadership position to Bouncing Boy, but seems to have regained his position at the beginning of season 2.
Ryan Kennedy as Rokk/Cosmic Boy on Smallville.
  • Cosmic Boy, along with Saturn Girl and Lightning Lad, made his live-action debut in the eleventh episode of the eighth season of the CW series Smallville, portrayed by actor Ryan Kennedy. In the episode, Rokk is seen as the silent leader type. The most determined of the group, Rokk comes the closest to killing Chloe Sullivan, only to be stopped by Clark Kent, who informs Rokk that any Legion inspired by him should never resort to murder. When the group does defeat Brainiac by extracting him from Chloe - Rokk playing a crucial role as he magnetically extracts the particles of Brainiac from her body - Rokk changes the Legion rules accordingly. Just before he leaves, Rokk warns Clark of the days ahead, telling him to be careful. Though mainly referred to as Rokk, Lightning Lad calls him "Cos" at one point in the episode. He later returns in the season finale to give Clark a new Legion ring after his was destroyed in "Infamous" and warns him that nothing can stop Doomsday from killing him. He gives Clark the ring and tells him to send Doomsday to the future, as the Legion is prepared to fight him there.


  • Cosmic Boy (along with Saturn Girl and Lightning Lad) appears in Lego DC Comics Super Heroes: Justice League – Cosmic Clash, voiced by Yuri Lowenthal. He, along with Saturn Girl and Lightning Lad, appears in the year 2116 as the last surviving members of the Legion of Super Heroes. In 2116, where Brainiac has taken over the Earth and turned Superman into his cyborg minion, Batman arrives with the use of the Cosmic treadmill to free Superman to send him back to the present. The Legion attempts to slow down Superman, but are presumably killed by Superman, with Cosmic Boy being killed by the use of Superman's heat vision. This was later revealed to be an illusion cast by Saturn Girl. After Batman succeeds in freeing Superman from Brainiac's control and sending him back to the present, the Legion give Batman their last Time Bubble to send him home.

Video games

  • In Injustice 2, Cosmic Boy and other members of the Legion of Superheroes are seen in Brainiac's ending where Brainiac 5 posed as Brainiac in order to defeat Brainiac. While they grilled him for going back in time to stop Brainiac, they are pleased that he stopped Brainiac's rampage.


  1. ^ a b Greenberger, Robert (2008), "Cosmic Boy", in Dougall, Alastair (ed.), The DC Comics Encyclopedia, New York: Dorling Kindersley, p. 89, ISBN 0-7566-4119-5, OCLC 213309017
  2. ^ Rogers, Vaneta; Cliff Biggers. "Their Name is Legion". Comic Shop News (1093).
  3. ^ Legends #1-6 (November 1986 – April 1987)
  4. ^ "Superboy returns to the Legion / Plus Dave Cockrum and Mike Grell on the costume designs".

External links

Braal (DC Comics)

Braal is a fictional planet in the DC Comics universe. It is the homeworld of a race of magnetism manipulators. Its most famous resident is Cosmic Boy, a DC Comics' superhero and founding member of the Legion of Super-Heroes. It was also home to his brother Pol, who later joined the Legion as Magnetic Kid, and in the post-Zero Hour continuity is the home planet of Dyrk Magz, a.k.a. Magno. Braal was first mentioned in Adventure Comics #247 (April 1958).

Garoto Cósmico

Garoto Cósmico (English: Cosmic Boy) is a 2007 Brazilian animated film directed by Alê Abreu. The film debuted at the 2007 Anima Mundi, and was theatrically released in Brazil on January 11, 2008.The film featured several Brazilian singers and actors such as Arnaldo Antunes, Vanessa da Mata, Wellington Nogueira and Belchior. It was the last film in which the actor Raul Cortez participated, voicing the character Giramundos.

Garth Ranzz

Garth Ranzz, also known as Live Wire and Lightning Lad, is a fictional comic book superhero appearing in books published by DC Comics, usually those featuring the Legion of Superheroes, a 30th and 31st century group of which he is a founding member. He has the superhuman ability to generate electricity, usually in the form of lightning bolts.

Laurel Gand

Laurel Gand is a fictional superheroine in the 30th/31st-century DC Comics universe, and a member of the Legion of Super-Heroes. She was created as a replacement for Supergirl in post-Crisis on Infinite Earths Legion continuity. She was also inspired by elements of Superman's supposed descendant Laurel Kent (who, in post-Crisis, pre-Zero Hour continuity, was revealed to be a Manhunter android).

Legends (comics)

Legends was a comic book crossover story line that ran through a six-issue, self-titled limited series and various other titles published by DC Comics in 1986 and 1987. Each of the individual crossover/tie-in issues had a Legends Chapter # header added to their trade dress.

The series was plotted by John Ostrander, scripted by Len Wein, pencilled by John Byrne, and inked by Karl Kesel.

Legion of Super-Heroes

The Legion of Super-Heroes is a fictional superhero team appearing in American comic books published by DC Comics. Created by writer Otto Binder and artist Al Plastino, the Legion is a group of superpowered beings living in the 30th and 31st centuries of the DC Comics Universe, and first appears in Adventure Comics #247 (April 1958).

Initially, the team was closely associated with the original Superboy character (Superman when he was a teenager), and was portrayed as a group of time travelers. Later, the Legion's origin and back story were fleshed out, and the group was given its own monthly comic. Eventually, Superboy was removed from the team altogether and appeared only as an occasional guest star.

The team has undergone two major reboots during its run. The original version was replaced with a new rebooted version following the events of the "Zero Hour" storyline in 1994 and another rebooted team was introduced in 2004. A fourth version of the team, nearly identical to the original version, was introduced in 2007.

Legionnaires 3

Legionnaires 3 is a four-issue comic book limited series published by DC Comics in 1986, the second limited series to feature the Legion of Super-Heroes. It was written by Keith Giffen and Mindy Newell, pencilled by Ernie Colón, and inked by Karl Kesel. The series pits the Legion's three founders against one of their deadliest enemies, the Time Trapper.

List of Legion of Super-Heroes members

The Legion of Super-Heroes is a superhero team in comic book series published by DC Comics. The team has gone through various iterations, along with two separate reboots. Starting with the founding trio of Cosmic Boy, Lightning Lad, and Saturn Girl, all versions of the team include teenage superheroes from several planets and alien races. In some versions, the team swells to two dozen or more members, with different sub-groupings, such as the Legion of Substitute Heroes.

Magnetic Kid

Magnetic Kid (Pol Krinn of the planet Braal) is a fictional comic book superhero in the DC Comics universe. He has the superhuman power of generating and controlling magnetism. He first appeared as a child in Adventure Comics #335 (August 1965), and joined the Legion of Super-Heroes in volume 3, #14 (September 1985). His brother was the Legionnaire Cosmic Boy.

Magno (comics)

Dyrk Magz, codenamed Magno, is a fictional character, a superhero in the post-Zero Hour future of the DC Comics universe, and a former member of the Legion of Super-Heroes.

Night Girl

Night Girl (Lydda Jath) is a fictional character in the 30th century of the DC Universe. She is a member of the Legion of Substitute Heroes, and of the most recent incarnation of the Legion of Super-Heroes. She first appeared in Adventure Comics #306 (March 1963).

Polestar (disambiguation)

Polestar is the official Volvo Cars performance company and brand.

Pole star, polestar or polar star may refer to:

Pole star, a bright star that is approximately aligned with the axis of rotation of a planet

Polaris, North pole star of the Earth

Polestar (comics), a Spider-Man villain

Cosmic Boy or Polestar, a DC Comics Superhero of the Legion of Super-Heroes

Polar Star (novel), a 1989 novel by Martin Cruz Smith

NLV Pole Star, a lighthouse tender vessel

USCGC Polar Star (WAGB-10), an icebreaker

MV Polar Star, a former cruise ship by Polar Star Expeditions

Polestar Racing Group, an American motorsport team currently competing in the Atlantic Championship

Polestar Racing, a Swedish motorsport team currently competing in the STCC and V8 SuperCars Championship

"Polar Star" (song), a song by F.T. Island

Polestar, a monument in Letterkenny

Polestar, the company of Philip Segal

Polestar, developed the Japan-exclusive game Magical Pop'n

Polestar Preschool, an area in the SNES RPG EarthBound

Polyarnaya Zvezda (disambiguation) (Russian-language titles)

Polar Star (Decembrist journal)

Polar Star (Herzen)

R. J. Brande

Rene Jacques "R. J." Brande is a fictional DC Comics character in the 30th and 31st centuries with the Legion of Super-Heroes. He first appeared in Adventure Comics #350 and was created by E. Nelson Bridwell.

Saturn Girl

Saturn Girl (Imra Ardeen) is a fictional superheroine appearing in American DC comic books. A talented telepath from the 30th century, Saturn Girl is a founding member of the Legion of Super-Heroes. Imra's "Saturn Girl" title refers to her homeworld of Titan, the largest moon of the planet Saturn.

There have been three versions of Imra since her original debut, separated by the events of both the Zero Hour and Infinite Crisis limited series. Saturn Girl made her live-action debut in an episode of Smallville, and she is portrayed by actress/singer Alexz Johnson. Recently Imra Ardeen appeared in the third season of Supergirl set in the DC Arrowverse, portrayed by Amy Jackson. In this version she is from the future and was Mon-El’s wife.

Sun Boy

Sun Boy is a fictional character, a superhero in the 30th and 31st centuries of the DC Comics universe. Sun Boy (real name Dirk Morgna of the planet Earth) is a Legion of Super-Heroes member with the ability to unleash internal solar energy to whatever degree he wishes, from enough to light a single candle to enough to melt nearly any obstacle.

Sun Boy first appeared in 1961 during the Silver Age of Comic Books.

The Greatest Hero of Them All

"The Greatest Hero of Them All" is a story arc that was published by DC Comics, and presented in Superman vol. 2, #8, Action Comics #591, and Legion of Super-Heroes vol. 3, #37–38 from August through September 1987. It was written by Paul Levitz and John Byrne, and pencilled by Byrne, Greg LaRocque and Mike DeCarlo. The story arc was DC’s first attempt to correct the inconsistencies in Legion history created when the original Superboy was removed from mainstream DC continuity in the Man of Steel limited series.

In the aftermath of the Zero Hour and Infinite Crisis miniseries, this story is no longer canonical.

The Legion Academy

The Legion Academy is a training school for members of the Legion of Super-heroes. It was created by Jim Shooter and Curt Swan, and has been re-used and revisited by subsequent creators in the many evolving iterations of the Legion that have been published over the decades. The Academy is both a source of supporting characters and subplots for the ongoing Legion titles (which have an established history of searches, competitions and understudies meant to expand the roster), and has also groomed several fan favorite characters for eventual starring roles. Chemical King, Dawnstar, Karate Kid II, Magnetic Kid, Tellus and Timber Wolf are all graduates of the Academy. Training there may be deficient to some degree, however, as Chemical King, Karate Kid II and Magnetic Kid have all died in the line of battle, though as two of those were selfless sacrifices made to save others, they clearly teach heroism quite well.

In recent stories, the Academy has been run by long-term Legionnaires Duplicate Damsel and Bouncing Boy, a married couple who take on quasi-parental roles with the students. Also assisting is Night Girl, a former Substitute Legionnaire and one time lover of Legion leader Cosmic Boy. News that fan-favorite artist Phil Jiminez was contributing art generated early excitement. The most recent cast included a mix of older and new characters including Power Boy, Gravity Kid, Chemical Kid, Variable Lad, Glorith and Dragonwing.

Time Trapper

The Time Trapper is a fictional character, a supervillain in stories published by DC Comics. The Time Trapper's main enemies are the Legion of Super-Heroes.

The Time Trapper's main powers are depicted as vast control over time itself. The Time Trapper's lair has been located at the end of time.

Wil Wheaton

Richard William Wheaton III (born July 29, 1972) is an American actor, blogger, and writer. He portrayed Wesley Crusher on the television series Star Trek: The Next Generation, Gordie Lachance in the film Stand by Me, Joey Trotta in Toy Soldiers and Bennett Hoenicker in Flubber. Wheaton has also appeared in recurring roles as Aqualad in Teen Titans, Cosmic Boy on the Legion of Super Heroes and Mike Morningstar/Darkstar in the Ben 10 universe. He also appeared regularly as a fictionalized version of himself on the CBS sitcom The Big Bang Theory and in the roles of Fawkes on The Guild, Colin Mason on Leverage and Dr. Isaac Parrish on Eureka. Wheaton is also the host and co-creator of the YouTube board game show TableTop.

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Notable members
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Supporting characters
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