Pre-existing characters used in Williams Street productions

In the early days of Williams Street, many characters were recycled for use in their shows from different Hanna-Barbera productions, this practice fell out of use after Aqua Teen Hunger Force.

Space Ghost
"The Heat Thing" (1966)

Zorak
"Zorak" (1966)

Moltar
"The Ovens of Moltar" (1966)

Brak
"The Lure" (1966)

Harvey Birdman
"X the Eliminator" (1967)

Fred Flintstone
The Flintstones
"The Flintstone Flyer" (1960)