The Alien was a giant robot controlled by the chief engineer.
Physical appearance[]
The alien is a big mechanical head made out of car parts, examples being tires for eyeballs, windows for the eyeholes, doors for the cheeks and the front bumper for the mouth.
Personality[]
He was territorial and hostile towards those who remained on the Sydney Harbour Bridge, he was also eager on getting out of the area by taking cars and reusing the parts for a spaceship.
History[]
Scooby-Doo! World of Mystery[]
The chief engineer created the giant robot in order to frightened away people that drove under his spot on the bridge and steal their respective car, then get rich off of it.
After being able to thwart off the gang after a couple encounters. He fell for a trick where Shaggy and Scooby used the bridge guard's car to reach up to him, they land near him and approach. Do to his allergies towards dogs, his machine fell apart after one big sneeze, and he later fell off the edge and got caught on some rope on the way down, and he was fired and arrested for the thefts.
Robot falls apart revealing the chief engineer.