Speed with Guy Martin
Gravity Racer
E4 Nov 16, 2014 47m TV-PG
In the last episode of the new series, Guy Martin attempts to build and race the world's fastest soapbox racer, creating a unique design, with help from expert designers and bobsled racers, and training with the Team GB women's bobsled pair.
Where to Watch Gravity Racer
Cast of Gravity Racer