The first half shows the cast being interviewed in character and provides movie plot back story. The second half shows behind-the-scenes filming, including cast and crew interviews.
| Actor | Role |
|---|---|
 Emile HirschSpeed Racer | Speed Racer |
 Christina RicciTrixie | Trixie |
 John GoodmanPops Racer | Pops Racer |
 Susan SarandonMom Racer | Mom Racer |
 Matthew FoxRacer X | Racer X |
 Benno FürmannInspector Detector | Inspector Detector |
 Hiroyuki SanadaMr. Musha | Mr. Musha |
| RRainTaejo Togokahn | Taejo Togokahn |
 Richard RoundtreeBen Burns | Ben Burns |
 Paulie LittSpirtle Racer | Spirtle Racer |
 Joe MazzaNitro | Nitro |
| JJoon ParkKatsu Teppodama | Katsu Teppodama |
 Christian OliverSnake Oiler | Snake Oiler |
 Scott PorterRex Racer | Rex Racer |
| DDavid LeitchGus Gustaferson | Gus Gustaferson |
 Leland CrookeRocky Rubington | Rocky Rubington |
 John BenfieldCruncher Block | Cruncher Block |
 Moritz BleibtreuGray Ghost | Gray Ghost |
 Ralph HerforthCannonball Taylor | Cannonball Taylor |
 Roger AllamMr. Royalton | Mr. Royalton |
 Ashley WaltersPrince Kabala | Prince Kabala |
 Waldemar KobusVinnie | Vinnie |
| WWillyChim Chim | Chim Chim |
| KKenzieChim Chim | Chim Chim |