In 1976 a new high-speed train, the Inter-City 125, helped save British Rail, an unfashionable nationalised industry suffering from a financial crisis, industrial relations problems and a poor public image. The train was launched with the help of a memorable advertising campaign, fronted by Sir Jimmy Savile, which announced that the 1980s would be the 'age of the train'. BR had an energetic new boss, Sir Peter Parker, who was determined to revive the railways. The result was a typically British success story, full of surprises and setbacks, as this documentary shows.