The Sleep Files: Altered States
- annos singulos: 1998
- Patriam: United Kingdom
- genus: Documentary
- Studio: Twenty Twenty Television, Discovery Communications
- keyword:
- Director: Joseph Bullman
- cast: Nigel Anthony, Rosalind Cartwright, Denise Corke, Michel Corke, Penny Corke, Floyd S. Cornelison, Jr., M.D.
