Other Uses
- Unknown (magazine)
- The Unknown (Animorphs), a book by K. A. Applegate
- The Unknown, a comic book mini-series by Mark Waid, published by BOOM! Studios
- Unknown (Tekken), a character in Tekken
- Amnesia: The Dark Descent or Unknown, a video game
- The Unknown, an album by Mark B and Blade
- Unknowns, variables in equation solving
- Unknown, a Unicode script
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