The Mystery, Inc. team investigates two mysteries. In the first, a phantom is haunting the Opal Theater where the Mystery, Inc. gang is being interviewed on the Tad Williams show. In the second, after the Mystery Machine breaks down several times, leading Freddie to call the National People's Radio program "Car Chat" with Cling and Clang, the Thunk-It Brothers, the brothers call on Scooby-Doo and the gang to help them with a problem with a phantom of the air.

At head of title: Scooby-Doo!

The phantom of the Opal! -- Car-tastrophe / John Rozum, writer ; Matt I. Jenkins, artist ; Rob Clark Jr., letterer ; Heroic Age, colors.