Full Throttle

A look at the tractors designed for snow, and for steam and those designed to save lives. In Burnham-on-Sea, cameras focus on the RNLI's Talus M8, which has been designed so it can head into the sea - even when the waves are lashing hard - and launch its lifeboats. Meanwhile, in Minnesota, viewers meet Kory, who has brought back to life a legend from the steam age, the Case 150.