When Shaggy inherits his uncle's mansion, he encounters ghostly tenants and asks the Boo Brothers for help. Featuring Don Messick as Scooby-Doo and Scrappy-Doo, and Casey Kasem as (my nephew) Shaggy. Supervising Director: Ray Patterson. Written by Jim Ryan. Producer: Kay Wright; Executive Producers: William Hanna and Joseph Barbera. Music Composed and Conducted by Sven Libaek; featuring the Main Theme by Bill Hanna. from Hanna-Barbera Productions, Syndicated by Worldvision Enterprises, Inc. - Part of H-B Superstars 10 movie package.