Uatu, often simply known as the Watcher, is a fictional character appearing in American comic books published by Marvel Comics. Created by Stan Lee and Jack Kirby, he first appeared in The Fantastic Four #13. He is a member of the Watchers, an extraterrestrial species who in the distant past stationed themselves across space to monitor the activities of other species. Uatu is the Watcher assigned to observe Earth and its Solar System.

"Original Sin" is a 2014 comic book storyline published by Marvel Comics. The story features Nick Fury and the Avengers investigating the murder of Uatu the Watcher, only to suffer trauma from what they see in his eyes. They also come into conflict with a group of misled self-appointed investigators led by Black Panther and Punisher.