"Wacky Races" was inspired by movies such as "The Great Race" (1965) and "Monte Carlo or Bust" (1969).
Each 30 minute show had 2 episodes (races).
The voice of the narrator was provided by Dave Willock.
The Slag Brothers first names were "Rock" and "Gravel".
The Gruesome Twosome were individually known as "Big Gruesome" and "Little Gruesome".
The Gruesome Twosome also had a fire breathing pet dragon in the back of their car, which added wing power to their spooky Gothic towered hotrod.
The Ant Hill Mob consisted of seven characters named: Danny, Ring-A-Ding, Kurby, Rug-Bug Benny, Mac, Cylde, and Willy.
Red Max has a car (The Crimson Haybailer) based on a World War I bi-plane - no doubt inspired by real life German air ace, the infamous Red Baron.
The Mean Machine used vicious spikes protruding from it's wheels that can rip through steel - this trick was employed by Roman chariot racers as a way of immobilising their opponents.
Penelope Pitstop went on to star in her own series "The Perils of Penelope Pitstop" (1969), also starring the Ant Hill Mob - who traded their Bullet Proof Bomb for Chugga-boom.
Dick Dastardly & Muttley went on to star in their own series "Dastardly and Muttley in Their Flying Machines" (1969).
The Slag Brothers (Rock and Gravel) undoubtedly inspired the series "Captain Caveman and the Teen Angels" (1977), also by Hanna-Barbera.
Hanna-Barbera produced the animated version of "The Addams Family" (1973) - although no direct comparison can be made to the Gruesome Twosome driving the Creepy Coupe!