First transmitted in 1979, this programme looks at the Rainhill Locomotive Trials in Rainhill, Lancashire (now Merseyside) in 1829, a competition to find the best passenger steam locomotive in Britain.On the 150th anniversary of the trials, replicas of its famous winner - Stephenson's 'Rocket' - and two of its competitors are rebuilt by modern day designers, and the trials are reconstructed in Hyde Park.

• Documentary