Plot: The final episode focuses on the period from the late 90s to the present day, when they were at the peak of their success - building iconic landmarks across Britain and the world - but also faced some of the biggest controversies of their careers. Rogers reveals what went wrong with the Millennium Dome, Foster recalls the wobbles of London's Millennium Bridge and Michael Hopkins explains how his new parliamentary building, Portcullis House, became the most expensive office block in Britain