According to series writer Warren Ellis, Doktor Sleepless may be a man named John Reinhardt, a trust-fund baby and boy genius who is shunned by the counter-culture he helped found. After disappearing from the city of Heavenside three years ago, he suddenly returns having undergone some changes during the interim. Upon his return, he's transformed himself from a relatively mundane man into what he describes as a "cartoon mad scientist," calling himself "Doktor Sleepless."