later in crossover comics such as Crisis on Infinite Earths (1986), Neil Gaiman's The Books of Magic (1991), The Trenchcoat Brigade (alongside Mister E, the Phantom Stranger, and John Constantine) (1999) and "Day of Judgement" (1999) as part of the Sentinels of Magic. Reboot In The New 52 (a 2011 reboot of the DC Comics universe), Doctor Occult appears in Justice League Dark, Constantine, Secret Six and The Books of Magic comic book issues. The rebooted version was derived from Jeff Lemire and Mikel Janin. Other versions Doctor Occult appears in comic books outside of the mainstream DC Universe in what is referred to as the multiverse. Many are adaption tie-ins such as: Justice League Unlimited comic #14 Issue #9 of the Batman: The Brave and the Bold comic series depicting him being with Batman, Doctor Fate, Sargon the Sorcerer, and Zatanna in order to defeat the Void. Injustice: Gods Among Us: Three Years Annual #1 He appears also in the Elseworld comic series, Superman & Batman: Generations II in issue #2. Depiction The character was portrayed by Jerry Siegel and Joe Shuster in many anthology pages as the "Ghost Detective", a private investigator who specializes in cases involving the supernatural. Siegel and Shuster then left the character for the more popular Superman. The character was then revised in September 1985 in the All-Star Squadron series comic books by Roy Thomas and was utilized many times by the author as afilliated by the superhero team. The fictional character's origin was revealed in Secret Origins (vol. 2) #17. (August 1987) by E. Nelson Bridewell and Roy Thomas. They depicted him and his partner Rose Psychic being slated as human sacrifices at the hands of a demonic cult, but were rescued by a shadowy group called "The Seven". The two were later trained in the use of occult magics themselves. Thirty-six years later, Doctor Occult opened up his own detective agency, specializing in crimes of a mystical nature and during World War II he joined the All-Star Squadron. At some point, he and Rose become fused into one being. Doctor Occult has used sorcery to halt or greatly slow the aging process, so that he appears in modern comics to still be a man in his late thirties or early forties, even though he was born at the end of the 19th century. He also appeared within the crossover storyline, Crisis on