"Unleashed" is the 16th episode of the first season of the American science fiction drama television series Fringe. It centered on a man-made chimera, which escaped from an animal testing facility and attacked various people, including Agent Charlie Francis, while the Fringe team tries to stop it. The episode was written by Zack Whedon and J. R. Orci, and directed by Brad Anderson. Actress Kiersten Warren guest-starred as Charlie's wife Sonia.