Three teenage brothers are terrorized by a trio of escaped mental patients disguised as clowns.
Unfortunately the movie Clownhouse is not yet available on HBO Max.
| Writing | Victor Salva | Writer |
| Production | Victor Salva | Producer |
| Directing | Victor Salva | Director |
| Production | Francis Ford Coppola | Executive Producer |
| Production | Karen Schmidt | Production Accountant |
| Production | Michael Hamm | Production Assistant |
| Crew | Tim Murray | Technical Advisor |
| Sound | Michael Becker | Musician |
| Production | Karen Schmidt | Production Coordinator |
| Production | Ellen Belsky | Production Assistant |
| Production | Craig Conolly | Production Assistant |
| Editing | Robin Mortarotti | Negative Cutter |
| Crew | Tom Mottram | Studio Teacher |
| Production | Anthony C. Ferrante | Production Assistant |
| Crew | Scott Kambic | Title Graphics |
| Crew | Eric Forbes | Technical Advisor |
| Sound | Thomas Richardson | Musician |
| Costume & Make-Up | Kurt Wells | Special Effects Makeup Artist |
| Costume & Make-Up | Vicki Fink | Special Effects Makeup Artist |
| Sound | Marian Wallace | Sound Assistant |
| Sound | Anna Davis | Assistant Sound Editor |
| Camera | Karen Lee | Still Photographer |
| Sound | Michael Emery | Supervising Sound Editor |
| Crew | Nick Sanza | Stunts |
| Sound | James Lindsey | Sound Effects Editor |
| Art | Dave Schultz | Graphic Designer |
| Crew | Brad Sanders | Carpenter |
| Art | Peggy Klaus | Other |
| Editing | Dale Caldwell | Color Timer |
| Sound | Marian Wallace | ADR Recordist |
| Editing | Jessica Mortarotti | Other |
| Sound | Richard Beggs | Sound Re-Recording Mixer |
| Art | Mandy Landa | Assistant Production Design |
| Camera | Robert Norgard | Camera Technician |
| Crew | Frank Sanza | Stunts |
| Editing | J.R. Lang | Other |
| Camera | Julian Whatley | First Assistant Camera |
| Camera | Elyse Couvillion | Clapper Loader |
| Sound | Mark Fay | Foley Artist |
| Art | Vicki Fink | Other |
| Sound | Robin Lee | Sound Effects Editor |
| Art | Roy Davenport | Other |
| Costume & Make-Up | Tom Rubalcava | Special Effects Makeup Artist |
| Art | William D. Fink | Other |
| Costume & Make-Up | Georgiana Hassan | Costume Assistant |
| Sound | Jenny Oznowicz | Assistant Sound Editor |
| Art | Steven Aguilera | Other |
| Art | Gloria Davenport | Other |
| Camera | Edward Nelson | Assistant Grip |
| Camera | Dennis Hale | Grip |
| Costume & Make-Up | Steve Fink | Special Effects Key Makeup Artist |
| Sound | Jeff Watts | Supervising Sound Effects Editor |
| Sound | Sabrina Plisco | Sound Recordist |
| Sound | Sandina Bailo-Lape | Supervising Sound Editor |
| Art | Steve Fink | Other |
| Lighting | Dick Favaro | Lighting Director |
| Camera | Jim Cassedy | Second Assistant Camera |
| Editing | Brenda Cox Giguere | Other |
| Crew | Nick Sanza | Stunt Coordinator |
| Sound | Darrell Lew | Assistant Foley Artist |
| Sound | Paul Raymond Bertoli | Foley Artist |
| Crew | Dave Starr | Carpenter |
| Editing | Ruth Ann Bumala | Other |
| Camera | Clarence Novak | Steadicam Operator |
| Camera | Mike Elwell | Steadicam Operator |
| Sound | Sara Roberts | Assistant Sound Editor |
| Camera | Bob Sitzwohl | Key Grip |
| Camera | Bret Allen | Grip |
| Costume & Make-Up | Brenda Cox Giguere | Makeup Designer |
| Sound | Michael Becker | Original Music Composer |
| Production | Michael Danty | Production Manager |
| Production | Roy Anthony Cox | Production Designer |
| Camera | Robin Mortarotti | Director of Photography |
| Production | Robin Mortarotti | Producer |
| Art | Bill Bacon | Assistant Production Design |
| Art | Tom Rubalcava | Art Direction |
| Editing | Roy Anthony Cox | Editor |
| Sound | Thomas Richardson | Original Music Composer |
| Production | Roman Coppola | Executive Producer |
| Crew | Robert Capra | Carpenter |
| Crew | Robin Mortarotti | Post Production Supervisor |
| Editing | Sabrina Plisco | Editor |
| Costume & Make-Up | Brenda Cox Giguere | Costume Designer |
| Production | Tim Young | Casting Director |
| Costume & Make-Up | William D. Fink | Assistant Makeup Artist |
| Production | Michael Danty | Producer |
| Crew | Michael Danty | Post Production Supervisor |
| Production | Sara Ström | Associate Producer |
