Scooby-Doo en de bende werken samen met hun vrienden, Bill Nye The Science Guy en Elvira Mistress of the Dark, om dit mysterie van gigantische afmetingen op te lossen en Crystal Cove te redden!
Nee, helaas is Happy Halloween, Scooby-Doo! nog niet beschikbaar op Netflix in Nederland.
| Directing | Maxwell Atoms | Director |
| Writing | Maxwell Atoms | Screenplay |
| Production | Maxwell Atoms | Producer |
| Production | Sam Register | Executive Producer |
| Production | Kris Zimmerman | Casting |
| Editing | Mike Mangan | Editor |
| Sound | Steve Rucker | Original Music Composer |
| Crew | Robert J. Kral | Additional Music |
| Production | Shaun Avnet | Line Producer |
| Production | Colin A.B.V. Lewis | Line Producer |
| Production | Monique Mosbe | Assistant Production Manager |
| Visual Effects | Daniel Schier | Character Designer |
| Art | Damon Moran | Prop Designer |
| Art | Demetrice Wilson | Prop Designer |
| Art | Joey Adams | Storyboard Artist |
| Art | Tim Divar | Storyboard Artist |
| Art | Danny Ducker | Storyboard Artist |
| Production | Greg Emerson | Other |
| Crew | Brittany Canasi | Post-Production Manager |
| Sound | Jeff O. Collins | Other |
| Sound | Mark A. Keatts | Supervising Dialogue Editor |
| Sound | Mark A. Keatts | ADR Editor |
| Sound | David M. Cowan | Dialogue Editor |
| Sound | David M. Cowan | ADR Editor |
| Sound | Kelly Ann Foley | Dialogue Editor |
| Sound | Kelly Ann Foley | ADR Editor |
| Sound | Patrick J. Foley | Dialogue Editor |
| Sound | Patrick J. Foley | ADR Editor |
| Sound | Michael Garcia | Dialogue Editor |
| Sound | Michael Garcia | ADR Editor |
| Editing | David Cowles | Online Editor |
| Editing | Cris Mertens | Other |
| Production | Frances E. Chang | Administration |
| Production | Liz Carroll | Administration |
| Production | Debbie Lindquist | Production Accountant |
| Production | Chaz Murphy | Production Accountant |
| Production | Maral Simonian | Production Accountant |
| Production | Athena Wingate | Production Accountant |
| Production | Bobbie Page | Production Supervisor |
| Production | Susan Ward | Production Supervisor |
| Production | Ed Adams | Production Manager |
| Production | Jay Bastian | Executive In Charge Of Production |
| Crew | Joe Ruby | Thanks |
| Crew | Ken Spears | Thanks |
