Created by writer Gerry Conway and artist John Buscema, the character first appeared in Fantastic Four #135 (June 1973).
[2] Thomas Gideon debuted in Fantastic Four #135 (June 1973), created by Gerry Conway and John Buscema.
Gregory concocted a scheme to defeat the Fantastic Four within one week, but accidentally trapped Thomas in his time machine before reconciling with him after he returns to the present day.
Gregory attempts to use the mutated genes of the Fantastic Four to cure himself, but is defeated and killed after Dragon Man escapes his control.
[12][13] In Secret Wars, Silver Surfer and Dawn Greenwood escape the destruction of the multiverse and help Glorian and his assistant Zee rebuild it.
Glorian appears in the Avengers Assemble episode "Hulk's Day Out", voiced by Robin Atkin Downes.