The New Scooby-Doo Movies - Season 1 - Eps 6: A Good Medium Is Rare
When the gang find a lost dog, they return her to her owner, Phyllis Diller. They soon learn that Ms. Diller's house is haunted, presumably by the ghosts of her deceased husbands.But is it really ghosts. . .or someone trying to scare her into giving out the combination for her safe, which houses her priceless jewel collection?
About The New Scooby-Doo Movies

Title: The New Scooby-Doo Movies
First Air Date: 1972-09-09
Last Air Date: 1973-10-27
Status: Ended
Rating: 7.7/10 (from 252 votes)
Language: EN
Seasons: 2
Total Episodes: 24
Network: CBS
Genres: Animation, Mystery, Comedy, Kids, Family
Production Companies: Hanna-Barbera Productions
Synopsis
Aside from doubling the length of each episode, The New Scooby-Doo Movies differed from its predecessor in the addition of a rotating special guest star slot; each episode featured real-life celebrities or well known fictional characters joining the Mystery, Inc. gang in solving the mystery of the week. Some episodes, in particular the episodes guest-starring the characters from The Addams Family, Batman, and Jeannie, deviated from the established Scooby-Doo format of presenting criminals masquerading as supernatural beings by introducing real ghosts, witches, monsters, and other such characters into the plots.
Cast

Don Messick
Scooby-Doo (voice)

Casey Kasem
Shaggy (voice)

Frank Welker
Fred Jones (voice)

Nicole Jaffe
Velma (voice)

Heather North
Daphne (voice)