Robert Llewellyn and Ashley Hames test their knowledge of extreme machines. Based on the popular card game of the 1970s and 80s, the series uses the Top Trumps format to examine all manner of contraptions. The intrepid duo compare two high-tech fire engines. Ashley heads to Glasgow to try out a brand-new aerial rescue platform, and Robert gets to grips with Bristol Airport's Cobra 2 - a bright-yellow fire-fighting machine.