Army psychiatrist Colonel Kane is posted to a secluded gothic castle housing a military asylum. With a reserved calm, he indulges the inmates' delusions, allowing them free rein to express their fantasies.
You can now watch The Ninth Configuration online on the following streaming providers in the United States.
| Writing | William Peter Blatty | Screenplay |
| Writing | William Peter Blatty | Novel |
| Directing | William Peter Blatty | Director |
| Production | William Peter Blatty | Producer |
| Production | William Paul | Executive Producer |
| Art | J. Dennis Washington | Art Direction |
| Editing | Roberto Silvi | Editor |
| Camera | Gerry Fisher | Director of Photography |
| Editing | Battle Davis | Editor |
| Editing | Peter Lee-Thompson | Editor |
| Art | Bill Malley | Production Design |
| Sound | Barry De Vorzon | Original Music Composer |
| Editing | Tony de Zarraga | Editor |
| Camera | Steve Stafford | Camera Operator |
| Sound | John Caper Jr. | Music Editor |
| Art | Sydney Ann Smith-Kee | Set Decoration |
| Sound | Gordon Ecker | Supervising Sound Editor |
| Directing | John Franco | Script Supervisor |
| Costume & Make-Up | Tom Bronson | Costume Design |
| Lighting | Laurie Shane | Gaffer |
| Camera | Egon Endrényi | Still Photographer |
| Camera | Mike Rutter | Assistant Camera |
| Sound | Stan Gilbert | Dialogue Editor |
| Crew | Jeannie Epper | Stunts |
| Production | Tom Shaw | Associate Producer |
| Editing | Peter Taylor | Supervising Editor |
| Sound | Colin Charles | Sound |
| Sound | Marvin Walowitz | Sound Editor |
| Sound | Andrew London | Sound Editor |
| Sound | David Pettijohn | Sound Editor |
| Sound | Lon Bender | Assistant Sound Editor |
| Sound | Robert L. Harman | Sound Re-Recording Mixer |
| Sound | Jim Cook | Sound Re-Recording Mixer |
| Sound | Charles Grenzbach | Sound Re-Recording Mixer |
| Crew | Willard Flanagin | Special Effects |
| Camera | Jimmy Waters | Key Grip |
| Art | Tom Shaw Jr. | Property Master |
| Production | Jack Baur | Casting Consultant |
| Production | Anne Shaw | Production Coordinator |
| Production | Gordon K. Kee | Production Accountant |
| Crew | Bobby Bass | Stunt Coordinator |
| Crew | Tim Rossovich | Stunts |
| Crew | Gary Epper | Stunts |
