Terry Rex is an experiment to make a Tyrannosaurus Hero.
Terry Rex is the Hero Factory's longest experiment, as they worked longer on him then on him for nine years. This is longer than the time it took to build Hugo Hak. But after nine years, it became clear that he would be one of the most successful Heroes from the Hero Factory.
Terry Rex was on a mission on the planet Cherivac, with the Murder Team. In a battle with a big tribe named "The Churikans", he was attacked by sixty-five people from the tribe yet managed to defeat all of them.