Bizarre nightmares plague Regan MacNeil four years after her possession and exorcism. Has the demon returned? And if so, can the combined faith and knowledge of a Vatican investigator and a research specialist free her from its grasp?
| Directing | John Boorman | Director |
| Sound | Ennio Morricone | Original Music Composer |
| Production | John Boorman | Producer |
| Editing | Tom Priestley | Editor |
| Art | Richard Macdonald | Production Design |
| Writing | William Goodhart | Writer |
| Production | Richard Lederer | Producer |
| Camera | William A. Fraker | Director of Photography |
| Art | Dan Perri | Title Designer |
| Writing | Rospo Pallenberg | Writer |
| Crew | Whitey Hughes | Stunt Coordinator |
| Art | Jack T. Collis | Art Direction |
| Art | John P. Austin | Set Decoration |
| Costume & Make-Up | Robert De Mora | Costume Design |
| Editing | Ron Spang | Assistant Editor |
| Editing | Axel Hubert Sr. | Associate Editor |
| Editing | John Merritt | Editor |
| Production | Charles Orme | Associate Producer |
| Writing | William Peter Blatty | Characters |
| Costume & Make-Up | Ron Berkeley | Makeup Artist |
| Costume & Make-Up | Wayne Edgar | Makeup Artist |
| Costume & Make-Up | Gary Liddiard | Makeup Supervisor |
| Costume & Make-Up | Lynda Gurasich | Hair Supervisor |
| Costume & Make-Up | Carrie White | Additional Hairstylist |
| Costume & Make-Up | Gae Clark Butler | Hairdresser |
| Costume & Make-Up | Terry Miles | Makeup Artist |
| Costume & Make-Up | Dick Smith | Special Effects Makeup Artist |
| Production | John R. Coonan | Unit Production Manager |
| Production | William C. Gerrity | Unit Production Manager |
| Directing | Victor Hsu | Second Assistant Director |
| Directing | Rospo Pallenberg | Second Unit Director |
| Directing | Phil Rawlins | Assistant Director |
| Directing | William S. Beasley | Assistant Director Trainee |
| Art | Richard Lawrence | Assistant Art Director |
| Art | Gene Rudolf | Art Direction |
| Art | Richard M. Rubin | Property Master |
| Art | Harold Broner | Construction Coordinator |
| Art | Kathrin Boorman | Draughtsman |
| Sound | Jim Atkinson | Sound Effects Editor |
| Sound | Les Fresholtz | Sound Re-Recording Mixer |
| Sound | Walter Goss | Sound Mixer |
| Sound | Michael Minkler | Sound Re-Recording Mixer |
| Sound | Arthur Piantadosi | Sound Re-Recording Mixer |
| Sound | Russ Hill | Sound Effects Editor |
| Art | Dean Mitzner | Assistant Art Director |
| Art | Peter R. Romero | Assistant Art Director |
| Crew | Jim Blount | Special Effects |
| Crew | Wayne Edgar | Special Effects |
| Crew | Chuck Gaspar | Special Effects |
| Crew | Jeff Jarvis | Special Effects |
| Crew | Richard Ratliff | Special Effects |
| Visual Effects | Albert Whitlock | Visual Effects |
| Crew | Roy Kelly | Special Effects |
| Crew | Ted Koerner | Special Effects |
| Visual Effects | Gerry Johnston | Special Effects Supervisor |
| Crew | John Ashby | Stunts |
| Crew | May Boss | Stunts |
| Crew | Bennie Moore | Stunts |
| Costume & Make-Up | Betsy Cox | Costume Supervisor |
| Costume & Make-Up | Bruce Walkup | Costume Supervisor |
| Costume & Make-Up | Bill Milton | Costumer |
| Sound | Eugene Marks | Music Editor |
| Sound | Ennio Morricone | Orchestrator |
| Sound | Ennio Morricone | Conductor |
| Directing | Bonnie Prendergast | Script Supervisor |
