Speed with Guy Martin is a British documentary series for Channel 4, presented by Guy Martin, and narrated by Shaun Dooley. The four-part program sees motorcycle racer and mechanic Guy Martin attempt to create four speed-based challenges that enable him to explore the boundaries of physics and learn about the science of speed. Whether it's slip-streaming a racing driver to ride a bicycle at more than 100 mph using pedal power, or seeing if he can ride a motorbike across a lake, Martin seeks to find out what makes things go fast by getting his hands dirty in a range of unique engineering projects. Along the way celebrities well-known in the world of speed help him in his challenges.