McCloud challenges his fear of heights with an ascent of the 340ft Forth railway bridge.

McCloud tackles the walls and then the spire of the oldest building in the series: the medieval Salisbury Cathedral.

Kevin McCloud tackles the Jodrell Bank radio telescope as the designer and architectural journalist continues to scale some of Britain's highest structures. The ascent in Cheshire includes his worst moment so far - a perilous trip across a 1ft girder above a 200ft drop - before he climbs into the famous dish on top of the structure.

Kevin McCloud scales one of the City of London's stand-out architectural icons, Richard Rogers 's Lloyds Building, and gauges employees' opinions of the edifice. He also looks into the various structures that have housed the ! institution overthe years and charts the course of Rogers's project, which reached its culmination in 1978.

Kevin McCloud ascends the tallest council block in Europe, Trellick Tower in London's Notting Hill. He chronicles the 322ft structure's fortunes, from architect Erno Goldfinger 's original sixties vision of "streets in the sky", through its rock-bottom reputation in the eighties as a vertical slum plagued by drug abuse and crime, to its current English Heritage Grade II Listed status. With the help of long-term occupants and members of the residents' association, he discovers what has caused these radical changes.

Kevin McCloud travels to Liverpool to climb the monumental Anglican cathedral. The structure was the life's work of Giles Gilbert Scott , but it wasn't completed until 17 years after his death, which was, in itself, 75 years since work began. Before climbing the outside to the top of the 150ft bell tower, McCloud examines the inside and stands beneath the highest gothic arches ever built.