Four meddling kids and a dog who have nothing in common must come together to solve a big mystery in Coolsville
Frank Welker
Joe Keery
Pete Davidson
Madelaine Petsch
Melissa Benoist
Katherine McNamara
Chyler Leigh
Kate Melton
Danielle Panabaker
Kate Micucci
Antony Starr
Amy Smart
Freddie Prinze Jr.
Sarah Michelle Gellar
Michael Shannon
Linda Cardellini
Matthew Lillard
Alyson Hannigan
Rami Malek
Alison Brie
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