Mister Miracle was one of four series in Kirby's ambitious but short-lived Fourth World saga. The character was inspired by the early illusionist career of comic book artist Jim Steranko, while the character's relationship with Big Barda is based on Kirby's relationship with his own wife.
Thaddeus Brown was a circus escape artist whose stage name was Mister Miracle. As the first escape artist to use the name Mister Miracle, Brown mentored both Scott Free and Shilo Norman. After Brown's murder, Scott Free took up the Mister Miracle name, adopted Thaddeus' young ward Shilo Norman, and hired his assistant Oberon.
Scott Free is the son of Izaya (Highfather), the ruler of New Genesis, and his wife named Avia. However, as part of a diplomatic move to stop a destructive war against the planet Apokolips, Highfather agreed to an exchange of heirs with the galactic tyrant Darkseid; the exchange of heirs guaranteed that neither side would attack the other. Scott traded places with Darkseid's second born son Orion.
Eventually, Scott Free escaped and fled to Earth. His escape, long anticipated and planned for by Darkseid, nullified the pact between Darkseid and Highfather and gave Darkseid the excuse he needed to revive the war with New Genesis. Once on Earth, he became the protégé of a circus escape artist, Thaddeus Brown, whose stage name was Mister Miracle. Brown was impressed with Scott's skills (especially as supplemented with various advanced devices he had taken from his previous home). Scott also befriended Brown's assistant, a dwarf named Oberon. When Thaddeus Brown was murdered, Scott Free assumed the identity of Mister Miracle. Barda later followed Scott to Earth, and the two used their powers, equipment, and skills in the war against Darkseid, who was still interested in recapturing both of them. Eventually, tired of being chased on Earth by Darkseid's servants, Scott returned to Apokolips and won his freedom by legal means, through trial by combat.
Scott Free later became a member of the Keith Giffen-era JLA (as did Barda and Oberon), which recast him and Big Barda as semi-retired super-heroes that sought to live quiet lives in the suburbs when they were not involved in Justice League-related adventures. In particular, Scott Free was recast as a hen-pecked husband, who often found himself on the receiving end of his wife's temper, over her desire to live a quiet life on Earth.
During his time in the League, Scott developed an intense rivalry with League villain Manga Khan. The villainous intergalactic trader and black marketer repeatedly kidnapped Scott, ultimately convincing Scott's conniving former manager Funky Flashman into forging documents forcing Scott to work for Manga as his personal entertainer. To force him to go along willingly, Khan replaced Scott with a life-like robot who was ultimately murdered by Despero during his first mission with the Justice League. Scott ultimately escaped from Manga Khan's clutches and reunited with his wife and friends, though the shock was enough to cause Scott to ultimately quit the League and to take on a protege in the form of Shiloh Norman.
In the conclusion of Final Crisis, many of the New Gods are all seemingly reborn. Among their numbers are the apparently resurrected Mister Miracle, along with Barda.
Young Shilo Norman was the informal ward of escapologist Thaddeus Brown (Mister Miracle I), and he also served as an occasional stand-in. When Brown was murdered by a mobster named Steel Hand, Scott avenged his new friend's death by taking on the identity of Mister Miracle and brought Steel Hand to justice. After Brown's death, Shilo worked with Scott Free (the new Mister Miracle) and Scott's wife Barda.
A master escape artist himself, the now-adult Shilo was appointed security chief of the Slabside Island Maximum Security prison for Metahumans also known as the Slab. He held his own during the Joker's "Last Laugh" riot and was promoted to Warden of the Slab, which had by then been relocated to Antarctica. A somewhat re-conceived Shilo Norman appears in Grant Morrison's Seven Soldiers crossover. In Final Crisis #2, Shilo tells Sonny Sumo,"There was a cosmic war and the powers of evil won", prompting him to form a team to fight the evil gods.