The Sleep Files: Altered States
- Joer: 1998
- Land: United Kingdom
- Genre: Documentary
- Studio: Twenty Twenty Television, Discovery Communications
- Schlësselwuert:
- Direkter: Joseph Bullman
- Besetzung: Nigel Anthony, Rosalind Cartwright, Denise Corke, Michel Corke, Penny Corke, Floyd S. Cornelison, Jr., M.D.