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- Phantom of the Air (single appearance)(disguise)/
- Terri Grass (single appearance)
- Karl Castle (single appearance)(no lines)
- Police officer (single appearance)(no lines)
- The Mystery Machine
| Terri Grass as the Phantom of the Air|
Karl Castle as her accomplice
|They hated the humor of Car Chat and wanted to drive it off the air.|
- The Car Chat show with Cling and Clang, the Thunk-It brothers, parodies the real NPR radio show Car Talk with Click and Clack, the Tappet brothers.
- Tom and Ray Magliozzi, the real-life "Tappet brothers" were pleased by their parody appearance in the comic and sent John Rozum an autographed picture.
- Terri Grass with her show Fresh Breath parodies Terry Gross with her NPR show Fresh Air.
- Karl Castle parodies Carl Kassel, another NPR host.