The Watcher
The Watchers are one of the oldest alien races in the universe. Each member of their race is dedicated to watching and recording the events of the universe as they unfold, and have sworn not to interfere. However, Uatu, the Watcher assigned to watch Earth, has developed a fondness for humanity. On many occasions, Uatu had broken his vow and helped humans in times of great danger, most notably assisting the Fantastic Four in stopping Galactus on his first visit to Earth.
