Oliver Callahan


 * For the female character also known as Lefty Callahan, see here.

Oliver Callahan was an American animator, having worked primarily for Hanna-Barbera.

TV series

 * Scooby-Doo, Where Are You! - animation (season 1) (credited as Oliver E. Callahan)
 * The New Scooby-Doo Movies - animation (season 1) (credited as Lefty Callahan)
 * The Scooby-Doo Show - animation (season 1) (credited as O.E. Callahan)
 * The New Scooby and Scrappy Show - animation (season 1) (credited as Lefty Callahan)
 * The 13 Ghosts of Scooby-Doo - animation (season 1)
 * A Pup Named Scooby-Doo - animation director (season 1)

TV specials

 * Scooby Goes Hollywood - song sequences directed by, animation

TV films

 * Scooby-Doo Meets the Boo Brothers - animation director
 * Scooby-Doo and the Ghoul School - animation director