The friends Emmett, Freddy, Marie, Kevin and his reluctant girlfriend Jessie decide to spend the Halloween night in an abandoned hospital. Meanwhile, the younger Allan meets the old friend of his father Arlo Ray Baines and asks him to help to find his vanished sister Meg in the same spot. The two groups meet each other in the mental institution section on the haunted third floor.
You can now watch Boo online on the following streaming providers in the United States.
| Sound | Alan Howarth | Original Music Composer |
| Editing | Chris Conlee | Editor |
| Crew | Danny Wayne | Stunt Coordinator |
| Production | David E. Allen | Producer |
| Production | Harmon Kaslow | Executive Producer |
| Directing | Anthony C. Ferrante | Director |
| Writing | Anthony C. Ferrante | Writer |
| Visual Effects | Michael Shelton | Visual Effects Supervisor |
| Production | Brian Patrick O'Toole | Co-Producer |
| Sound | J.M. Logan | Sound Designer |
| Crew | Carl Bartels | Cinematography |
| Production | Lisa Essary | Casting |
| Crew | Guy Flint | Studio Teacher |
| Sound | Michael J. McDonald | Supervising Sound Editor |
| Directing | Eli Olson | Second Assistant Director |
| Directing | Sherry Gunderman | Script Supervisor |
| Crew | Andre D. Munoz | Carpenter |
| Sound | Brad Whitcanack | Sound Effects Editor |
| Crew | David A. Brooke | Makeup Effects |
| Sound | Alex Ullrich | Foley Artist |
| Directing | Mike Greene | First Assistant Director |
| Crew | Kevin Wasner | Makeup Effects |
| Production | Sheri Bryant | Co-Producer |
| Camera | Nick Franco | Director of Photography |
| Camera | Dominic Mainl | First Assistant Camera |
| Costume & Make-Up | Lorraine Martin | Makeup Department Head |
| Sound | Marcus Andexler | Sound Recordist |
| Camera | Richard E. Garcia | First Assistant Camera |
| Lighting | Jose Aguirre | Electrician |
| Art | Sam Greenmun | Production Design |
| Art | Sam Greenmun | Art Designer |
| Art | John Stewart | Art Direction |
| Crew | John Stewart | Compositor |
| Crew | Jan Turetsky | Studio Teacher |
| Crew | Craig Wadlin | Carpenter |
| Directing | Keith Jones | First Assistant Director |
| Camera | Robert Baird | First Assistant Camera |
| Crew | Mike Horn | Carpenter |
| Production | Dennis Sugasawara | Line Producer |
| Costume & Make-Up | Jeannette M. Fuller | Costume Design |
| Costume & Make-Up | Misa Aikawa | Key Makeup Artist |
| Costume & Make-Up | Tracy Wilcox Gillie | Key Makeup Artist |
| Directing | Shelly Heyward | Second Assistant Director |
| Crew | Scott Gerard | Carpenter |
| Crew | Damon Anthony Guilfoyle | Carpenter |
| Art | Todd Knowlton | Property Master |
| Art | Louis Pantelakos Jr. | Set Dresser |
| Sound | Ben Cooper | Sound Designer |
| Sound | Joel Jaffe | Foley Editor |
| Sound | Shawn Keating | Sound Designer |
| Sound | Benjamin Vallery | Boom Operator |
| Crew | John Bordeaux | Special Effects Coordinator |
| Crew | Charlie Parrish | Stunt Coordinator |
| Lighting | Brian M. Fisher | Gaffer |
| Camera | Amos James | Key Grip |
| Lighting | Justin Maresch | Electrician |
| Camera | Kelsey Shaw McNeal | Still Photographer |
| Camera | Richard Moriarty | First Assistant Camera |
| Camera | Scott Probe | Dolly Grip |
| Editing | Vinny Ciminera | Colorist |
| Crew | Kathy Abbott | Studio Teacher |
| Production | Sybille Herwig | Production Coordinator |
| Crew | Dutchess Botti-Smith | In Memory Of |
