Scooby-Doo! Mystery Incorporated - Season 1 - Eps 22: Attack of the Headless Horror
When Fred's favorite adventurer, Dr. Rick Spartan, starts teaching biology at the Crystal Cove's High School, the gang gets to meet him. Fred tells him that the gang has also been into some terrifying experiences, Spartan immediately invites them to have dinner at his place, where he promises to show them his latest trophy, the cursed Shrunken Head of Squar Gringot. But when its headless body appears and threatens to pursue the professor until the end of his days for plundering its tomb, the gang must find out a way to break the curse.
About Scooby-Doo! Mystery Incorporated

Title: Scooby-Doo! Mystery Incorporated
First Air Date: 2010-07-12
Last Air Date: 2013-04-05
Status: Ended
Rating: 8.223/10 (from 1018 votes)
Language: EN
Seasons: 2
Total Episodes: 52
Network: Cartoon Network
Genres: Animation, Mystery, Family
Production Companies: Warner Bros. Animation
Synopsis
This incarnation of the popular cartoon series finds Scooby and the gang living in Crystal Cove, a small town with a long history of ghost sightings, monster tales and other mysteries ripe for the sleuths to solve once and for all. But the longstanding Crystal Cove residents, who bank on the town's reputation to attract tourists, are prepared to do what it takes to protect their turf.
Cast

Frank Welker
Scooby-Doo / Fred Jones (voice)

Grey DeLisle
Daphne Blake (voice)

Mindy Cohn
Velma Dinkley (voice)

Matthew Lillard
Norville 'Shaggy' Rogers (voice)