<P> The series pays homage to the horror genre, drawing on many works from film, television and literature in both parodic and serious ways, from horror movie classics like A Nightmare on Elm Street, modern films such as Saw, television series Twin Peaks, and the works of H.P. Lovecraft, alongside the classic monster horror movies shown in previous series . In particular, in the second season, the central story arc evolves to heavily feature the use of Babylonian mythology, exploring the Anunnaki, the Babylonian and modern pseudo-scientific concepts of Nibiru, and the writings of Zecharia Sitchin . Other Hanna - Barbera characters occasionally guest - star, including Captain Caveman, Jabberjaw, Speed Buggy, The Funky Phantom, Blue Falcon and Dynomutt, and more . </P> <P> As was the case with the previous three installments in the franchise, Mystery Incorporated redesigns the main characters, this time into a retro look that returns them to their original 1969 outfits, with some small changes (such as Velma now wearing bows in her hair). The series is also the animated debut of Matthew Lillard as the voice of Shaggy, after he portrayed the character in two live - action films, Scooby - Doo (2002) and Scooby - Doo 2: Monsters Unleashed (2004). Casey Kasem, the original voice of Shaggy, voiced Shaggy's father in five episodes; this would be his last voice - acting role before his death . Linda Cardellini, who played Velma in the live - action movies, voiced Hot Dog Water, a recurring character in the series . The show also brought back characters seen in previous Scooby - Doo series such as the eco-goth rock band The Hex Girls and Vincent Van Ghoul from The 13 Ghosts of Scooby - Doo, though his character is portrayed as a direct homage to Vincent Price, being a famous horror movie actor rather than an actual warlock . </P> <P> Fred Jones, Daphne Blake, Velma Dinkley, Shaggy Rogers and Scooby - Doo are a team of teenage mystery solvers who live in the small town of Crystal Cove, the self - proclaimed "Most Hauntedest Place on Earth". The allegedly "cursed" town's long history of strange disappearances and ghost and monster sightings form the basis for its thriving tourist industry; as such, the adults of the town (chief among them being Fred's father Mayor Fred Jones Sr. and Sheriff Bronson Stone) are not happy that the kids are debunking all the supernatural goings - on that bring in so much revenue as the overwrought schemes of charlatans and criminals . </P> <P> In addition to the traditional cases they always solve, the team finds itself being nudged into the uncovering of a dark secret that is hidden in the past of Crystal Cove . Following cryptic hints from a faceless mystery - man known only as "Mr. E ." (a play on "mystery"), the gang unearths the legend of a cursed Conquistador treasure, the secret history of Crystal Cove's founding Darrow Family, and the mysterious, unsolved disappearance of four mystery - solving youths and their pet bird--the original Mystery Incorporated . Standing in the way of solving this mystery, however, there are the romantic entanglements pulling the kids apart: Shaggy finds himself unable to put his new romance with Velma ahead of his longtime friendship with Scooby, while Daphne pines for a trap - obsessed Fred, who obliviously struggles to realize he shares her feelings, too . </P>

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