Lewis, a young amateur theater director, is offered a job with a governmental program for the rehabilitation of mentally ill patients in a Sydney institution. His project is overrun by one of the patients who wants to stage the opera Cosi Fan Tutte by Mozart despite the fact that none of the patients are able to sing and none of them speak Italian. A comedy of errors ensues, but one which unifies the patients and their director in unexpected ways.
Unfortunately the movie Cosi is not yet available on HBO Max.
| Directing | Mark Joffe | Director |
| Writing | Louis Nowra | Writer |
| Camera | Kim Batterham | Camera Operator |
| Camera | Calum McFarlane | Focus Puller |
| Lighting | John Morton | Gaffer |
| Camera | Lester Bishop | Key Grip |
| Lighting | Matthew Hoile | Best Boy Electric |
| Crew | Dan Oliver | Special Effects Technician |
| Camera | Terry Cook | Assistant Grip |
| Camera | Sally Eccleston | Focus Puller |
| Camera | Alan York | First Assistant Camera |
| Camera | Jasmine Yuen Carrucan | Assistant Camera |
| Camera | Bede Haines | Clapper Loader |
| Crew | Billy Aziz | Special Effects Technician |
| Crew | Glenn Boswell | Stunt Coordinator |
| Lighting | Paul Selgren | Electrician |
| Camera | Philip le Masurier | Still Photographer |
| Directing | Russell Boyd | Third Assistant Director |
| Directing | Tony Gilbert | Second Assistant Director |
| Directing | Euan Keddie | First Assistant Director |
| Production | Bob Weinstein | Executive Producer |
| Production | Phaedon Vass | Executive Producer |
| Production | Lynn Gailey | Associate Producer |
| Production | Harvey Weinstein | Executive Producer |
| Art | Marita Mussett | Set Decoration |
| Crew | Tony Lynch | Stunt Coordinator |
| Sound | Stephen Endelman | Music |
| Production | Catherine Bishop | Production Manager |
| Costume & Make-Up | Mel Dykes | Costume Supervisor |
| Crew | Peta Black | Scenic Artist |
| Visual Effects | Simon Carr | Digital Compositor |
| Sound | Wayne Pashley | Dialogue Editor |
| Sound | Karin Whittington | Dialogue Editor |
| Visual Effects | Roger Cowland | Visual Effects |
| Production | Richard Brennan | Producer |
| Costume & Make-Up | Tess Schofield | Costume Designer |
| Directing | Jo Weeks | Script Supervisor |
| Art | Hugh Bateup | Art Direction |
| Costume & Make-Up | Noriko Watanabe | Makeup Department Head |
| Sound | Libby Villa | Dialogue Editor |
| Production | Jacinta Hayne | Production Coordinator |
| Editing | Nicholas Beauman | Editor |
| Sound | Andrew Plain | Supervising Sound Editor |
| Production | Timothy White | Producer |
| Sound | Dan Lieberstein | Music Editor |
| Camera | Ellery Ryan | Director of Photography |
| Sound | Chris Gough | Music Producer |
| Art | Chris Kennedy | Production Design |
| Crew | Robin Gray | Score Engineer |
| Sound | Christine Woodruff | Music Supervisor |