Danger D'Amo, better known as The Timekeeper, is the main antagonist of Spy Kids 4: All the Time in the World, played by Jeremy Piven. He kidnaps Marissa Cortez Wilson to take her necklace from her, which she has entrusted to Rebecca Wilson.
His true Identity is Danger D'Amo, which Cecil concluded it was an anagram the spelled Armageddon (as in the Armageddon project). In his childhood, he was born over 50 years before this movie took place and constantly ignored his father when he told him not to touch the time machine. But alas, he went into the time machine just as his father put it on and was stuck in time. Some how, half of his physical body moved into the future.
Every time he goes under the identity, the Timekeeper, and tried to go back in time, it works momentarily then is shoved back to the future as an older (sometimes severely wounded) version of him self, all of his minions are revealed to be himself, including his unrenamed side kick.