Scooby Doo and the Witch's Ghost Original Production Cel Signed by Bob Singer: Shaggy and ScoobyShaggy and Scooby MEDIUM: Original Production Cel on Printed Background SIGNED: Bob Singer SIZE: 10. 5" x 9" PRODUCTION: Scooby Doo and the Witch's Ghost SKU: IFA11789 ABOUT THE IMAGE: The Hanna Barbera cartoon, Scooby Doo, Where Are You? was launched in 1969 and has had the longest run of a cartoon series. Over the years its been in 19 TV series (on CBS, ABC, the WB, Cartoon Network and Boomerang) and more than 40 animated films and two live action