If you know of events, exhibitions, books, programmes or websites that ought to be included in Foresight, contact Andrew Mylius. Tel (020) 7505 6656, e-mail andrewmy@construct. emap.co.uk
Power into art - the battle for the new Tate gallery: The third in this documentary series follows development of the gallery's self-supporting steel staircase - it was prefabricated by a ship builder and assembled on site - and reveals the complexity of delivering a high profile millennium project.
8.00pm, Channel 4
Savage planet - rivers of rock: A look at volcanic rivers of the kind that spilled down Mount St Helens in Washington State in 1980 with such devastating effect. Bridges, roads, more than 200 houses and hectares of forest were razed by the torrent.
19 April-3 June
Photographs by Richard Glover documenting conversion of London's Bankside Power Station into the UK's newest temple to art, Tate Modern.
Royal Institute of British Architects, 66 Portland Place, London.
Margate mainline: The kind of train set your grandfather had (or wanted) - a rare opportunity to see the largest portable pre-1964 Hornby 'O' gauge railway in the UK.
National Railway Museum, York
Details, (01904) 621261. www.nrm.org.uk
One foot in the past - sex in the Georgian city: Historian Dan Cruikshank gets behind the elegant 18th century facades to discover how the urban infrastructure supported a prolific sex industry.
7.35pm BBC 2
International symposium on wide span enclosures:
Tensile structures meister Frei Otto launches three days devoted to wide spans, with contributions from Japanese, US, UK and German luminaries. Watch out for presentations on the Eden biospheres in Cornwall, Arnhem Zoo, Sydney's Olympic Stadium, Luxembourg's Kirchberg Mall, and from London the Millennium Dome and British Museum Great Court.
University of Bath
Details, Val Whitehill, fax (01225) 826691. E-mail: firstname.lastname@example.org
Until 28 May
Kind of blue - experiments in sustainable product design: Small exhibition of 32 prototypes including lighting, jewellery, radios, telephones and furniture by designer Stuart Walker.
Design Museum, London
Details (020) 7378 6540
The march of intellect: Exhibition exploring 200 years of futurology, invention and visionary thinking.
The Science Museum, London
Details (020) 7938 8000
Do not be put off by the Rocky Mountain Institute's muted website graphics - the content is accessible, digestible and, for many, will be provocative. The RMI, headed by green design guru Amory Lovins, is at the forefront of moves to reconcile market economics with environmental responsibility. If you feel the word 'sustainability' has more buzz than substance and want to redress the balance, this is a good place to start.