We are living in an age of experiment. The 80s have seen a rich crop of radical and controversial ideas about the form and content of buildings. This second of ten programmes looks at four high-profile movements in modern architecture. 'Post-modernism' is alive and well, represented by Philip Johnson 's mammoth AT&T building in New York, Graves' building in Oregon, Isozaki's Civic Centre in Japan, and the new Stuttgart museum by James Stirling. Recent factories designed by Rogers and Foster epitomise 'High-Tech.' Richard Meier 's Atlanta Museum represents a reinterpretation of the 'Modern Movement'. And, most controversial of all, the skyscraper hasn't been killed off. It is living through a multitude of mutations, reinvested with a wit and daring reminiscent of its earliest incarnations. Joining the debate are James Stirling , Philip Johnson , Richard Rogers , Norman Foster , Richard Meier and architectural writer Ada Louise Huxtable.