Ep. 20: Oriena Flux mencari mesin GRX sementara Pops menegurnya mengenai masa lalu mesin tersebut yang berbahaya.
A woman named Oriena Flux and her henchmen uncover a powerful and dangerous high speed engine called the GRX in order to ensure that they win the Oriental Grand Prix. When they test it on the track, Pops recognizes the sound of the engine and warns Speed not to go near it. Out of suspicion, Pops takes Spritle and Chim-Chim to the cemetery where the engine was buried. They go to Oriena's house afterwards, where Pops demands the engine so he can destroy it like he should have done 10 years ago when it was first built. Speed decides that he wants to learn more about the car so he can find a way to beat it in the race, and ends up driving it. The high speed is thrilling to him at first, but he is overpowered by the stresses and falls unconscious while driving. (Source: Wikipedia)
Episode
- Ep. 16 · Speed Racer Diundang ke Balapan Bawah Tanah di Gunung Berapi Kapetapek di Tengah Ketegangan Politik
- Ep. 17 · Balapan kecepatan di Kapecapek sementara Racer X mengungkapkan identitas aslinya sebagai Kabala
- Ep. 18 · Speed dan Trixie mencoba menyelamatkan Twinkle Banks saat melakukan aksi berbahaya di atas Air Terjun Niagara.
- Ep. 19 · Speed dan Twinkle menghadapi Cornpone Brotch di markasnya di Mount Rushmore.
- Ep. 20 · Oriena Flux mencari mesin GRX sementara Pops menegurnya mengenai masa lalu mesin tersebut yang berbahaya.
- Ep. 21 · Pops menyelamatkan Speed dari uji coba berkendara Oriena yang diperkuat gas dan membantunya mengatasi ketakutannya terhadap kecepatan.
- Ep. 22 · Dr. Nightcall dan putrinya mencuri Mizmo Beam untuk membangun pesawat Mach 5 terbang dengan bom atom untuk Cumulus.
- Ep. 23 · Speed berhadapan dengan Cumulus di markas bawah lautnya, memicu konfrontasi fatal yang melibatkan putri Dr. Nightcall.
- Ep. 24 · Prince Jam dan Spritle bertabrakan saat balapan pemuda setelah plot penculikan