S 40 Maths: Matrix Algebra. 7.5 Music and images. 7.30 Plate Tectonics.

for Asian women

12.30 Teaching and Control
An analysis of teaching and discipline in the classroom.
12.55 Music and Images
The uses of music in film and television.

The Embassy World Professional Snooker Championship
This morning the stage was reset and one table remains this afternoon as the best-of-31-frames semi-finals begin. According to the seedings, STEVE DAVIS should be playing RAY REAR-DON and CLIFF THORBURN crossing cues with TERRY GRIFFITHS. DAVID VINE looks at how the final four have survived to this stage, and at their prospects of reaching Saturday's Final. Commentators TED LOWE , JACK KARNEHM
CLIVE EVERTON , VERA SELBY

Second of two reviews of the work of barristers examining the assumptions shared by barristers about their work, through interviews with a number of leading legal figures: LORD SCARMAN, MICHAEL ZANDER , Heads of Chambers and members of the Inns of Court.
Producer KEN UTILE
A BBC/Open University production

The classic serial in 12 episodes 11: A Prince in Bondage
(For cast see tomorrow at 5.40 pm)

A personal view by J. Bronowski in 13 programmes.
7: The Majestic Clockwork
This programme illustrates the revolution that occurred when Einstein's theory of relativity turned Newton's elegant description of the universe inside out.
Series editor ADRIAN MALONE

Further coverage

with subtitles, followed by Weather

Match angling from the River Bann at Portadown, Northern Ireland. Jack Charlton introduces the second heat of television's knockout fishing competition. Match commentator FETE THOMPSON Today's peg order:
STEVE GARDENER , DAVE RICHARDSON MAX WINTERS , PETE BURRELL DICKY CARR , PAT MCCLARNON
Director KEITH ACKRILL Producer ROY RONNIE

The Embassy World Professional Snooker Championship .
The second semi-final began earlier this evening at the Crucible Theatre.
DAVID VINE introduces coverage of tonight's match, together with news of the other semi-final that began this afternoon. Commentators
TED LOWE , JACK KARNEHM
CLIVE EVERTON. VERA SELBY

Introduced by Angela Rippon with Anthony Green , RA
Once again the annual Summer Exhibition at the Royal Academy of Arts will be embellished by a series of cushion concerts, during which young people sit listening to music in the main gallery. In this special television recording, musicians and others involved in the concert are .asked to select their particular choice of works from the 1982 Summer Exhibition.
Special guests include:
Richard Baker , Julian Lloyd Webber and Julia McKenzie.
The music is Mozart's Serenade in E flat for woodwind octet, played by ENDYMION ENSEMBLE
Director ANTONIA CHARLTON Produced by KEN GRIFFIN

The Embassy World Professional Snooker Championship
DAVID VINE introduces coverage of the second semi-final.

by Wilkie Collins, dramatised in five parts by Ray Jenkins

Fosco and Glyde have deprived Laura of her fortune and her identity and Anne Catherick lies buried in Limmeridge churchyard as Lady Glyde. Marian and Walter have joined forces and he has discovered Glyde's dread secret.

Cast in order of appearance: [see below]

(Repeated on Sunday)

Presenters PETER SNOW, JOHN TUSA and DONALD MACCORMICK bring you the major events of the day, and the pictures, interviews and analysis that explain their significance. JOAN BAKEWELL has first news of stories from the arts; DAVID ICKE and MARSHALL LEE have the stories from behind the world of sport.

Further coverage of the World Championship from the Crucible Theatre, Sheffield.