6.25 Exploring Frequency Space
6.50 Design: Assembly of Lorries
7.15 Zone Fossils
7.40 The Nature of Chemistry
8.5 Properties of Enzymes: 1
8.30 Light: In Search of a Model
8.55 Occupations: Brian's Britain
9.20 Maths: Convergence
9.45 Participation in Rehousing
10.10 Materials Processing: Metal
10.35 Nuclear Power USA
11.0 Power Plants of the Cell
11.25 Computing in Electronics
11.50 Waves
12.15 Wolverton for Pride
12.40 Cells and Organisms
1.5 Cyanide
1.30 Juggling with Physics

Live coverage of the singles final of The State Express
Classic from the West Hants Club,
Bournemouth.

In the countryside near New York a butterfly lays its eggs on a leaf. Days later a caterpillar emerges to eat its way into the world and meet life's dangers. Nature's miracle transforms the grub into the fragile beauty of the butterfly which heightens the perils of its transient life by fluttering into the city's untold terrors.
Directed by ROBIN LEIIMAN

at the Crucible, Sheffield venue for the World Snooker Championship later this week.
It's been described as ' the most exciting theatre to open in Britain since the war '. The programme - recorded during the Crucible's tenth anniversary celebrations-looks at how it's developed, and at the play chosen to take advantage of its unusual thrust stage.
Director hue MURRAY
Producer peter STAUNTON

The Schweppes Welsh Cup Final: Cardiff v Bridgend from Cardiff Arms Park

In a repeat of last year's final, Cardiff, the holders, led again by John Scott, will hope to match Bridgend's achievements in 1979 and 1980 by winning the trophy for the second year running.

Nigel Starmer-Smith commentates, and brings news of the rest of the week's rugby.

The news of the week, plus a visual commentary for those who cannot hear, with Michael Sullivan
Editor riciiard gamble

The last of the present series Presented by Brian Widlake and Valerie Singleton Britain's most popular business and financial magazine reporting from far and near on money large and small. Featuring this week: What Sunday's Been Missing?
Next Sunday a new national Sunday newspaper The Mail on Sunday-hits the streets. Its marketing claims that the new paper is ' what Sunday's been missing'. But is there really room for a new Sunday newspaper? In an exclusive, behind-the-scenes report prepared over the last five months, Nick Clarke examines the prospects for the first new national Sunday for 21 years.
And including Moneymaker, making the most of your savings.
Producer JENNIE CLAYTON
Deputy editor ANDREW CLAYTON Editor DAVID LLOYD

Etosha - The Place of Dry Water
Yet this treeless ground is no desert. It is, rather, a teeming stage on which some of the most powerful and fragile, beautiful and bestial wildlife in Africa performs its yearly drama of fighting, mating, devouring and dying. Narrator Ian Holm
Music MIKE TRIM and HELEN IIURDEN Film editor ciiris praser
Photographed and produced by DAVID AND CAROL HUGHES
Series editors PETER JONES , antuony Isaacs BBC Bristol

with Michael Sullivan ; Weather

by WILKIE COLLINS , in five parts
2: Walter Hartright was startled by the resemblance of Laura Fair-lie to the woman in white whose identity he has discovered.

featuring motor racing's Formula One World Championship
Much of the limelight this season has shone on the former world champion Niki Lauda - his victory at Long Beach three weeks ago moves him up to third in the drivers' table, just ahead of reigning champion Nelson Piquet. Although the Brazilian is today seeking a hat-trick of wins at the Imola circuit, the reliability of the British-built Williams could prove decisive for Finland's championship leader Keke Rosberg.
TV presentation by Italian TV Service

In the last of seven programmes Owain Arwcl Hughes conducts and introduces the music of Bach, Berlioz, Mendelssohn, Mozart, Prokofiev and Verdi. with Marie McLaughlin LONDON SYMPHONY ORCHESTRA leader MICHAEL DAVIS LONDON SYMPHONY CHORUS trained by RICHARD COOK
An outside broadcast from the Barbican Hall. The Barbican Centre, London
Produced by joiin vebnon

starring Orson Welles
Edward G. Robinson , Loretta Young This gripping thriller, directed with great flair by Orson Welles , is one of the finest examples of hunt, chase and catch movie melodramas. Edward G. Robinson plays the leading role of Wilson, a detective determined to track down a notorious Nazi war criminal. A former aide of the man is permitted to escape and Wilson follows him to America. The trail leads to a sleepy Connecticut town....
Produced by Sam Spiegel after the critical success but commercial failure of Citizen Kane and The Magnificent Ambersons, the film demonstrates once again the wide range of Orson Welles ' inimitable talents as actor and director.
Screenplay by ANTHONY VEILLER
Based on a story by VICTOR TRIVAS and DEC LA DUNNING
Produced by SAM SPIEGEL Directed by ORSON WELLES
, Films: page 13