Tim Dunn is in London exploring the striking stations of the Piccadilly Line's northern extension. Tim also takes a look at Causey Arch in County Durham.

Tim Dunn rides on a funicular railway powered by water. Also, how an abandoned Victorian railway tunnel in Northamptonshire is being transformed into a racetrack.

Tim Dunn explores Wingfield, one of the oldest surviving railways and uncovers the longest brick viaduct in the UK, the Welland Viaduct in Northamptonshire.

Tim visits Sheffield station which been reinvented for the 21st century. He also helps to restore the Bennerley Viaduct in the Erewash valley.

Tim explores the last working roundhouse in the UK - Barrow Hill in Derbyshire. Tim also visits Bath, a city renowned for its Georgian architecture.

Tim Dunn goes behind the scenes at Bristol Temple Meads, a Grade 1 listed station, and is given special access to Brunel's old Tudor station and boardroom.

Tim Dunn explores Huddersfield's Grade I listed station and examines the station's clock, and visits Cologne's magnificent Hohenzollern Bridge in Germany.

Tim Dunn visits Weymss Bay Station in Inverclyde - an architectural gem. He also explores the engineering marvel that is Blackfriars station in central London.

Tim Dunn visits the Royal Albert Bridge and finds out how it was constructed. He also visits Wolverhampton to learn about the history of its train stations, old and new.

Tim Dunn is in Windsor to find out how two rail companies fought to be first to get to Queen Victoria. He also explores the stunning Connel Bridge in the Scottish Highlands.