The New Scooby and Scrappy-Doo Show - Season 1 - Eps 8: No Thanks, Masked Manx
The gang goes to Blake Manor for a vacation, and gets there in time for the costume party, where Mr.Blake will be auctioning off a valuable stamp worth millions. But there is a cat burglar, the Masked Manx, on the loose, who leaves an ace of spades in the place of every item he steals. Can the kids stop him and save the stamp?
About The New Scooby and Scrappy-Doo Show

Title: The New Scooby and Scrappy-Doo Show
First Air Date: 1983-09-10
Last Air Date: 1984-12-01
Status: Ended
Rating: 8.1/10 (from 141 votes)
Language: EN
Seasons: 2
Total Episodes: 52
Network: ABC
Genres: Animation, Mystery, Family, Comedy, Kids
Production Companies: Hanna-Barbera Productions
Synopsis
The New Scooby and Scrappy Doo Show is the sixth incarnation of the Hanna-Barbera Saturday morning cartoon Scooby-Doo. It premiered on September 10, 1983, and ran for one season on ABC as a half-hour program made up of two eleven-minute short cartoons. The show is a return to the mystery solving format and reintroduces Daphne after a four-year absence. The plots of each episode feature her, Shaggy, Scooby-Doo, and Scrappy-Doo solving supernatural mysteries under the cover of being reporters for a teen magazine.
Cast

Casey Kasem
Shaggy Rogers (voice)

Heather North
Daphne Blake (voice)

Don Messick
Scooby-Doo / Scrappy-Doo (voice)