Mark Sebastion Grayson was only seven years old when his father Nolan revealed that he was the superhero Omni-Man as well as an alien, and that Mark was half-alien. Nolan told Mark that his people, the Viltrumites, were a race of peaceful explorers and that he had come to Earth to help mankind. He also told his son that one day he would develop super powers. Every day he got up hoping that he'd have powers but alas they had not developed. Until his last year of high school. He first developed his super strength while working at his after school job. While tossing out the trash, Mark hurled a trash bag at least a hundred miles away speaking " it's about time" . Secondly, he developed flight, which he developed by jumping off his roof. He was testing out his flight when he saw (and stopped) three jewel thieves. His father tried to get a costume made for him; the first one is an oufit that the hero Bulletproof of the Guardians of the Globe now wears. Mark could not decide on his costume so the superhero tailor Art Rosenbaum, told him to come back later aftr he had picked out a name. After protecting a dorky young guy from being bullied Mark is sent to the principles office, where the principle tells him he is not invincible. Marks name enlightens and he dawns the moniker Invincible.

Two months later Mark met the Teen Team, a young group of heroes consisting of Robot, Dupli-Kate, Rex-Splode and Atom Eve and helped them capture Maulers, two super strong super smart twins. Invincible would also team up with his father to battle an alien invasion from a group called the Flaxians who captured Nolan before and wanted revenge for his leading a revolt and escaping. However their dimension's time moves faster than ours; they created devices to halt their aging here, but those were soon destroyed and the Flaxians retreated. At school the next day he recognizes Atom Eve, a member of the Teen Team. The two become friends and fight their teacher when they discover he had been strapping bombs to students and blowing them up in some elaborate scheme for vengence for the loss of his son and wife that left him. While Omni-Man was out of town Invincible fought Allen the Alien. Instead of being an evil alien, he was really testing the champions of planets. Omni-Man had always thought he was a bad guy because he didn't know that was Allen's job . After talking with Invincible, Allen realized he had been going to the wrong planet for fifteen years and left.

After High School, Mark leaves for college. While visiting Upstate University with his friend William they were attacked by a Reaniman (a robot/zombie), which was created by an evil student named D.A. Sinclair, who had been using homeless men in his experiments to turn the dead into his slaves and added robot parts to make them easier to control. William was looking for Rick Sherdian, who was turned into a Reaniman, and acting as a homeless man, allowed himself to be captured by D.A.

Mark(as Invincible) fought the Reanimen and stopped D.A., and as a result, William learned his secret identity. Meanwhile, Atom Eve quit the Teen Team after finding out that her boyfriend Rex-Splode was cheating on her with Dupli-Kate. She quit the team and started working with Invincible more. By the time she realized she had feelings for Mark, he had already been asked out by Amber Bennett and they started dating. She never told Mark that she liked him.

Soon after, the members of the Guardians of the Globe, (Earth's best superhero team) were murdered. A new team was formed (made mostly of members of the Teen Team). Invincible was offered a spot but declined. Mark and Eve still worked with them on several occasions. Mark would also fight and easily thart a group of terrorists called the (Lizard League Salamander, Iguana, Komodo Dragon, King Lizard) attempting to poison a towns water supply. He would soon meet Doc Seismic, who uses wrist bands to create earthquakes, and likes fighting famous super heroes.

When it was discovered that it was Omni-Man who had destroyed the Guardians, Mark confronts him. Omni-Man then reveals to his son that the Viltrumites weren't really peaceful explorers, but violent conquerers. Omni-Man had been assigned to take over Earth and he offered Mark the chance to do it with him. Mark refuses, and the two fight. Omni-Man easily wins, leaving Invincible in a coma for two weeks before leaving the planet himself. Upon his recovery, Mark started working for the Global Defense Agency. His liaison is Cecil Steadman, who also used to be Omni-Man's liaison as well.

Mark then meets a new villian Angstrom Levy. Originally Levy was creating a machine that would allow him to transport to other dimensions. He was to use his machine to find his counterparts and use their knowledge to "better the human race". Angstrom was being helped by Mark's old foes the Mauler Twins; he freed them from prison so they would help him with their super-intelligence. When Mark attacked the twins and their other-dimensional counterparts that were summoned by Angstrom, Angstrom removed himself from his machine to plead for Invincible's life. Sadly doing so caused a error in the machine and it exploded. Aferwords the New Guardians found Mark. Angstrom was found by a lone surviving Mauler. He was horribly disfigured (body and mind) but stated his plan is a success. He soon vowed revenge on Invincible, blaming him for the explosion.

Mark the discovers his father has a new alien wife, Andressa, who is a member of a bug like race with a 9 month life span, and a child Oliver who looks like a human with purple skin, on another planet. Oliver ages like his mother but Nolan thinks that once his powers come forth he will age slowly, like a Viltrumite. They are then attacked by Viltrumites and Nolan has his back broken while saving Mark and is arrested. Nolan tells Mark to read his books before he is taken away. The Viltrumites then give Nolan's assignment of taking over Earth to Mark and he is given a 100 year deadline. Mark reads Nolans books, and discovers that his father has been trying to use supposed science fiction to tell people how to hurt and defeat the Viltrumites. After being asked by Oliver's mother, Invincible takes his alien half-brother back home with him so his human mother can help rebuild her home and keep him safe. His mother agrees to raise him. Mark and Amber then visit Eve in Africa who was helping the natives with the use her powers. However Eve was annoyed with her desire to be closer to Mark, but Amber being around made this harder for her.

Mark rushes home after a threating phone call. When Mark arrives he finds his mother in Levy's clutches. Angstrom attempts to weaken Invincible by dragging him through various dimensions. It is here Mark meets Spider-man and the New Avengers. In anger and through irrationality Invincible beats Levy to death becuase of what he had done to his mother. Mark is then rescued by a group of Guardians from 15 years in the future, where Eve tells him to tell his Eve how he feels so she can move on. Once he returns he attempts to tell Eve how he feels, insted the two wind up kissing. The two are interrupted by a Martian invasion leaving their feelings unresolved.

Later while Mark is dealing with a separate alien invasion alongside a group of aliens called Sequids, a small group of the Guardians in Montana are fighting the Lizard League who are trying to start a nuclear holocaust. The attempt to stop the enemy goes horribly wrong and Shrinking Ray is eaten, Dupli-Kate is seemingly killed and Rex Splode has his hand bitten off and is shot in the head, but he survives. However Komdo Dragon, Iguana and Salamander also died during the battle. After a misunderstanding and a battle with Allen the Alien, The Immortal leaves the team, due to what happened to Kate. Eve returns to Earth after finding out that Mark has broken up with Amber due to some troubles because of Mark's superhero life and her having feelings for a guy named Gary. The two talk, and Mark informs her about her future if she doesn't move on. Later, Mark has lunch with his mom and talks about her new relationship. They are interupted by a Viltrumite woman named Anissa. The two viltrumites fight and she defeats Mark, then reminds him of his duty to take over Earth, but he (respectfully) declines. Allen the Alien is taken prisoner by the Vultrimites as a part of his plan to find Nolan; after learning about his books and his rebellion against Viltrum, Allen hopes to be placed in the same prison as Nolan so that he can save him from being executed. Invincible and Rex Splode team up to defeat Multi-Paul Dupli-Kate's twin brother, who is angry over his sister's death. It is then that it is revealed that Kate wasn't dead, just her dupes. She is in hidding for an unknown reason after her supposed death. She wanted to stop her brother without taking him to prison, but when she arrived to help Invincible she found that he had already stopped her brother and was going to send him to prison.

With Oliver's Vultrimite powers emerging, he has asked Mark if he can become his super hero partner. Mark is currently debating on whether to let him work with him.

Road to issue 50

Mark recently went looking for Atom Eve, and found her hiding in Africa. Cecil pages Mark, and tells him that Doc Seismic has captured all of the superheroes and are holding them underground. Invincible and Atom Eve go to help, and Mark destroys many of the monsters yet when he goes to fight Doc Seismic he is exhausted and passes out. After beating Doc Seismic, and finding out that Cecil has hired the evil creator of the Reanimen, and Darkwing II. Mark is stunned! He beats up Darkwing, and discovers that no one knows that he was actually a murderer. He talks with Atom Eve about making the biggest mistake of his life, and sees Cecil. Cecil brings him into the white room, and uses the Reanimen to attack Mark. It appears Cecil thinks that Mark has began to cross over to the dark side. Because he hasn't, and has a horrible temper, this could be the end of Cecil.

Mark fights a horde of Reanimen, only to find that Cecil has another way of keeping him in check. He discovers that Cevcil has placed something in his equilibrium. Mark flies away fro help form the New Guardians of the Globe, and they help him only for the charge to Mark's brain to go permanent, until robot blocks the frequency. Mark lashes out and destroys almost all of the Reanimen. Cecil tells Mark that he is fired, and Mark flies into him and pushes him against the wall, he tells him that everything he's been paid is his, to stay away from his family, and if he dare recruit Oliver than he'd kill him. Invinicible goes back home, and tells the story to his mom, brother, and Eve. Eve and Mark go into the backyard, and he tells her all he could thin of was her when he thought he was going to die, and they kiss. 

Powers

Invincible has super human strength (over 400 tons), speed, flight, and as his name states, invulnerability due to him being half human, half Viltrumite. While he cannot breath in space he is able to hold his breath long enought to fight and travel short distances without a space suit. He also appears to be uneffected by the vacuum or radiation of space. Due to his hybrid nature he is not as strong as a true Viltrumite, but it is expected that as he grows, so will his powers. By pushing his powers to the limits he is able to accelerate them. It is said that if he continues to push himself he will soon be as strong as his father. Presumably he also has an extended lifespan like a Vilrumite.

Media

Paramount pictures recently said that they have plans for an Invincible movie in the near future. They would like for Robert Kirkman to write the screenplay. There is no scheduled release date but rumors say that it will be released some time in 2009, or 2010.