After a hiatus, Ruegger and ABC decided that they would overhaul the series entirely, developing "A Pup Named Scooby-Doo" in 1988. At the time of the cancellation, twelve of the thirteen ghosts were recaptured in the chest of demons with the show-stopping production before the last ghost could be found. Originally it was debatable if Captain Ferguson, the antagonist of the episode "Ship of Ghouls", counted as one of the thirteen ghosts. However it was later confirmed by "Curse of the 13th Ghost" writer Tim Sheridan that Captain Ferguson was one of the thirteen. To date, it is the last "Scooby-Doo" running series to have featured Scrappy-Doo, who was eliminated after the three "Hanna-Barbera Superstars 10" movies in 1987.