Hailey attends her niece's school recital only to learn that the beloved music teacher has vanished. Hailey soon discovers several startling secrets amongst the staff, as well as a link between the missing young teacher and the school’s reconstruction funds.
Unfortunately the movie Hailey Dean Mysteries: 2 + 2 = Murder is not yet available on Disney Plus.
| Directing | Michael Robison | Director |
| Writing | Nancy Grace | Characters |
| Writing | Jonathan Greene | Story |
| Writing | Michelle Ricci | Writer |
| Production | Christian Bruyère | Producer |
| Production | Nancy Grace | Executive Producer |
| Production | Kellie Martin | Executive Producer |
| Sound | Hamish Thomson | Original Music Composer |
| Editing | Jason Pielak | Editor |
| Art | Nick Richardson | Production Design |
| Art | Fraser Hagen | Art Direction |
| Art | Donna McBride | Set Decoration |
| Costume & Make-Up | Geeta Dayal | Makeup Department Head |
| Directing | Michael Bishop | Third Assistant Director |
| Directing | Jason Furukawa | First Assistant Director |
| Sound | German Camardella | ADR Editor |
| Sound | Tony Gort | Sound Designer |
| Sound | Aaron Olson | Dialogue Editor |
| Sound | Joe Watts | Sound Re-Recording Mixer |
| Sound | Eric Weisner | Boom Operator |
| Crew | Martin Testa | Special Effects Coordinator |
| Crew | Carl Fortin | Stunt Double |
| Lighting | Blaine Ackerly | Gaffer |
| Crew | Jacob Bond | Generator Operator |
| Camera | Laurent Danis | First Assistant "A" Camera |
| Camera | Allister Foster | Still Photographer |
| Costume & Make-Up | Marco Pimenta | Assistant Costume Designer |
| Editing | Achim Kapitza | Colorist |
| Editing | Troy Weinreich | First Assistant Editor |
| Production | Saskia Werner | Post Production Coordinator |
| Sound | Valerie Biggin | Music Supervisor |
| Sound | Francesca Cammarata | Music Coordinator |
| Sound | Sian O'Byrne | Music Supervisor |
| Production | Patrick Mokrane | Production Accountant |
| Camera | Dana Barnaby | Director of Photography |
