7.40 Flux and Magnetic Circuits

8.05 Solubility

8.30 Forces, Fields and Energy

8.55 Impact of the Telescope

9.20 Oxfam

9.45 Engineering Mechanics

10.10 Methods of Educational Enquiry

10.35 Maths: Projects Mean People

11.11 The Relevance of Sociology

11.25 Teaching for Creativity

11.50 Education by Satellite: 2

12.15 Linear Maths

12.40 Being Black

A digest of the news of the week and other world matters, plus a visual commentary for those who cannot hear. with Kenneth Kendall
Editor BILL NORTHWOOD

J. S. Bach
Set in Brecon Cathedral, this videosonic treatment of Mary's song of praise for the forthcoming birth of Jesus is an interpretation of Bach's masterpiece through images and music. Janet Price (soprano)
Anne Howells (mezzo-soprano) Helen Watts (contralto) Kenneth Bowen (tenor) Stephen Roberts (bass)
Cardiff Polyphonic Choir and a section of the BBC Welsh Symphony Orchestra leader PETER THOMAS conducted by Roy Bohana
Director VINCENT DOWDALL

Narrators Hugh Falkus and Bill Mason

Each spring, as the sea-ice in the Bering Strait starts to crack open, groups of mighty Bowhead Whales begin a long migration towards their summer feeding grounds in the Arctic Ocean. This century, however, few people have seen a Bowhead, for the whaling industry hunted them close to extinction 90 years ago.

In 1973 a Canadian expedition set out by helicopter and sledge across the vast, jumbled ice-fields with the hope of filming and recording the Bowhead from close quarters. But they had to find them first...
A National Film Board of Canada production
(Bristol)
Talking whale: page 5

Weather

starring The Bachelors featuring Lena Zavaroni and The Vernons
Choreography LESLEY BROCKS
Musical director NORMAN PERCIVAL Designer LESLEY BREMNESS Producer ERNEST MAXIN

Sir Michael Tippett, who was 70 on 2 January, introduces selections from his own music, including A Child of Our Time, The Midsummer Marriage, The Knot Garden, and the Third Symphony.
Felicity Palmer, Josephine Barstow, Yvonne Minton, Robert Tear, Clyde Walker, Raimund Herincx
BBC Choral Society, BBC Singers BBC Symphony Orchestra leader ELI GOREN conductor Colin Davis Lindsay String Quartet
Associate conductor DAVID SYRUS Costume designer PRUE HANDLEY Lighting CLIVE THOMAS Sound ALAN EDMONDS
Designer KEITH CHEETHAM Producer DAVID BUCKTON

Once a year the Clerk of the Works of Salisbury Cathedral has to climb to the very pinnacle of the Cathedral spire, where there is an important task to be done. Below him is a drop of 404 feet.
Director JOHN BUSH
Mr Spring 's ascent: page 4

(Indaqine su un cittadino al di sopra di ogno sospetto) starring Gian Maria Volonte Florinda Bolkan
A Rome police inspector has built up a ruthless empire of spies, policemen and informers and has become obsessed with his enormous power and influence. Surely such an omnipotent being is above all moral standards of justice, even when he commits the ultimate crime, murder?
Director ELIO PETRI
This Week's Films: page 19

Martin Jarvis reads
Epilogue to Asolando by ROBERT BROWNING