6.40 Rodin

7.5 Computers - Algorithms

7.30 Measuring Fracture Toughness

Story: The Three Bears (traditional) Presenters: Carol Leader, Don Spencer
Pianist PETER PONTZEN
Designer VAL WARRENDER
Graphic designer LAURENCE HENRY
Written and directed by LESLIE PITT Producer ANNE GOBEY
Executive producer CYNTHIA FELGATE
Book, Play School: Ready to Play, £1.50, from bookshops; Play On (record REC 332, cassette zcm 332). Bang on a Drum, songs from Play School and Play Away (record REC 242, or cassette MRMC 004). from record shops

The Embassy World Professional Snooker Championship
The marathon 31-frame semi-finals continue today as the last four players battle for the £15,000 first prize.
DAVID VINE introduces live coverage from the Crucible Theatre, Sheffield.
Commentators TED LOWE
JACK KARNEHM , CLIVE EVERTON
Producers RICHARD TILLING , BILL TAYLOR

4.50 Internal Energy

5.15 Uranium
(to 17.40)

6.5 The Sense Organs

6.30 Is Fiscal Policy Stabilising?

Frame of the Day
DAVID VINE introduces an outstanding frame from today's semi-finals with the latest news and comments from the World Championships in Sheffield.

including a news summary with sub-titles for the hard-of-hearing, followed by Weather

Geoffrey Smith and Clay Jones with Beth Chatto at White Barn House.
A garden full of unusual plants, grouped to grow in the conditions they prefer - in the shade, or where it's dry, and in cold, boggy soil. A beautiful garden from which Mrs Chatto selects plants for her exhibit at Chelsea.
Produced by JOHN KENYON BBC Birmingham

'How can you get through to youngsters to whom throwing a bomb comes more naturally than listening to politicians' rhetoric?
This week: Ian Crawford, farmer Sue Grimes, policewoman David Harwood, unemployed fitter Krysia Kobziak, journalist Dave Silver, disc jockey invite Sile de Valera, 25-year-old Irish MP, granddaughter of famous Republican Eamon de Valera, to talk about Ireland.

BBC Manchester

Ten films in which Magnus Magnusson explores the Viking world. 7: An Island Called Thule
'Thule where, from the sun that has approached the Arctic pole, an ever-shining fire spreads out through the days and the nights.
After one day's sail from Thule the frozen sea is reached.'
The mysterious Thule of the ancients was at one time thought to be Iceland. What is certain, however, is that of all the Viking lands Iceland is the only truly Viking nation. A land both forbidding and fascinating, it was the unlikely setting for the birth of the world's most remarkable democracy.
MAGNUS MAGNUSSON returns to the land of the sagas. with Jeremy Kemp
Daniel Massey , Ben Kingsley
Music bv JACK POINT
Series adviser PROFESSOR p. h. SAWYER Research LIZ WRIGHT
Film editor MALCOLM DANIEL Producer RAY SUTCLIFFE
Series producer DAVID COLLISON

by David Cook

'We made a bargain, you and I. Knickers and high-heels one day a week and in the evenings sometimes. The rest of the week, you hold down your job, and keep your family.'

BBC Birmingham

The Embassy World
Professional Snooker Championship
Both 31-frame semi-finals have continued all day in the Crucible Theatre, Sheffield. DAVID VINE introduces highlights and the latest news from Sheffield.
Producer RICHARD TILLING

including news summary, weather forecast and sports results

Further coverage of the semi-finals.

The classic sci-fi series
Starring Sidney Blackmer, Phillip Pine, Mark Roberts
The invention of a serum which reshapes human flesh at will leads an evil politician to murder the US president and replace him with a remoulded duplicate in an attempt to gain world control.