The New Scooby and Scrappy-Doo Show - Season 2 - Eps 21: Sherlock Doo (1)
Fred joins the gang in a mystery-solvers' contest at the home of Sherlock Holmes in London. While solving one of Sherlock Holmes’s old cases, the Ghost of Sherlock Holmes appears. But is his goal to assist the gang in solving the mystery, or frame them for a theft? Guest stars Frank Welker as Fred.
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)