A research scientist explores the boundaries and frontiers of consciousness. Using sensory deprivation and hallucinogenic mixtures from native American shamans, he explores these altered states of consciousness and finds that memory, time, and perhaps reality itself are states of mind.
Unfortunately the movie Altered States is not yet available on HBO Max.
| Production | Daniel Melnick | Executive Producer |
| Sound | John Corigliano | Original Music Composer |
| Writing | Paddy Chayefsky | Screenplay |
| Production | Howard Gottfried | Producer |
| Editing | Eric Jenkins | Editor |
| Directing | Ken Russell | Director |
| Camera | Jordan Cronenweth | Director of Photography |
| Writing | Paddy Chayefsky | Novel |
| Production | Jeremy Ritzer | Casting |
| Art | Richard Macdonald | Production Design |
| Art | Thomas L. Roysden | Set Decoration |
| Costume & Make-Up | Ruth Myers | Costume Design |
| Production | Howard Feuer | Casting |
| Visual Effects | Bran Ferren | Visual Effects Director |
| Sound | Michael Minkler | Sound Re-Recording Mixer |
| Crew | John M. Woodward | Transportation Coordinator |
| Sound | Michael Colgan | Supervising Sound Editor |
| Camera | Morgan Renard | Still Photographer |
| Camera | James Glennon | Camera Operator |
| Sound | Les Fresholtz | Sound Re-Recording Mixer |
| Sound | Arthur Piantadosi | Sound Re-Recording Mixer |
| Directing | Carline Davis-Dyer | Script Supervisor |
| Camera | Garrett Brown | Steadicam Operator |
| Lighting | Gary Holt | Gaffer |
| Production | Paul Pav | Location Manager |
| Production | Stuart Baird | Associate Producer |
| Directing | Peter Schindler | Second Assistant Director |
| Art | Stan Cockerell | Assistant Property Master |
| Production | Stephen Kolzak | Additional Casting |
| Sound | Christopher Keene | Conductor |
| Editing | Arthur W. Forney | Assistant Editor |
| Production | Joel Thurm | Additional Casting |
| Sound | Willie D. Burton | Sound Mixer |
| Production | Lee Stitch | Production Secretary |
| Sound | Jay Wertz | Sound Editor |
| Sound | Donald Harris | Music Editor |
| Sound | Fred Stafford | Sound Editor |
| Costume & Make-Up | Dick Smith | Special Effects Makeup Artist |
| Production | David Silver | Unit Production Manager |
| Costume & Make-Up | Carl Fullerton | Special Effects Makeup Artist |
| Costume & Make-Up | Craig Reardon | Special Effects Makeup Artist |
| Crew | Chuck Gaspar | Special Effects |
| Crew | Larry L. Fuentes | Special Effects Assistant |
| Sound | Marvin E. Lewis | Boom Operator |
| Costume & Make-Up | Darryl M. Athons | Costumer |
| Costume & Make-Up | Shanan Harrell | Costumer |
| Art | Ronald C. Jacobs | Leadman |
| Sound | Colin Waddy | Sound Editor |
| Production | Susan Tarr | Research Assistant |
| Sound | Laurey Condon | Assistant Sound Editor |
| Editing | Thomas Penick | Assistant Editor |
| Sound | Don Higgins | Sound Editor |
| Sound | John David Earnest | Orchestrator |
| Crew | Scott Bartlett | Technical Advisor |
| Costume & Make-Up | Rick Baker | Special Effects Makeup Artist |
| Costume & Make-Up | Dione Taylor | Hairstylist |
| Costume & Make-Up | Michael Hancock | Makeup Artist |
| Art | Sidney H. Greenwood | Property Master |
| Lighting | Sal Martorano | Electrician |
| Art | Tony Dyson | Props |
| Lighting | Chris Strong | Electrician |
| Art | Jeff Howard | Assistant Art Director |
| Art | Roger Irvin | Construction Coordinator |
| Camera | Johnny E. Jensen | First Assistant Camera |
| Directing | Gary Daigler | Assistant Director |
| Camera | Carey Jones | Second Assistant Camera |
| Camera | Bob Rose | Key Grip |
| Lighting | Adam Glick | Lighting Technician |
| Costume & Make-Up | Rick Baker | Makeup Artist |
