Ep. 45: Speed enters a demolition derby to persuade former racer Gadge Zoomer to quit car wrestling.
Aired on February 11, 1968

Speed learns that former racing driver Gadge Zoomer has turned to car wrestling, also known as demolition derbies, to financially support his family. In an effort to convince him to abandon this destructive sport, Speed decides to enter the Mach 5 into a demolition derby. This specific episode was painted and traced in colour by the Colour Crew of Great Britain, as noted in the source material. The narrative focuses on Speed's attempt to change Gadge Zoomer's career path through direct competition within the derby setting.
Episodes
- Ep. 41 · A man builds a metal forest from melted cars to avenge his son's alleged injury
- Ep. 42 · Speed competes in the Pineapple Grand Prix in South America while criminals hunt for a hidden diamond.
- Ep. 43 · Speed becomes Princess Pedal's bodyguard in Hong Kong after witnessing two murders
- Ep. 44 · Speed faces a laser tank test by gangsters who stole secret weapon plans in Hawaii.
- Ep. 45 · Speed enters a demolition derby to persuade former racer Gadge Zoomer to quit car wrestling.
- Ep. 46 · Speed assists Skyhigh in protecting uraniumtane shipments from motorcycle Apaches in the American West.
- Ep. 47 · Speed and Pops battle a mad scientist's electronic brain-controlled Monster Car in Scotland.
- Ep. 48 · Baron von Vondervon hosts a race for 17-year-old girls to find his missing daughter Ivonna.
- Ep. 49 · Speed uses balloons on the Mach 5 to escape a deserted WWII island