6.25 Woodland Decomposers
6.50 The European City 7.15 Bath: 18th Century
7.40 Geometric Topology: Orientability
8.5 Using University Libraries
8.30 Into the Earth
8.55 Questioning Assumptions
9.20 Maths: Inverse Functions
9.45 20th-century Poetry
10.10 Mining
10.35 Why Build Models?
11.0 Spectroscopy in a Flash
11.25 Electrolysis and Oxidation
11.50 Biology: Membranes
12.15 Acceleration at Constant Speed?
12.40 Migration from a Turkish Village
1.5 Gambling on Science
1.30 Maths Methods: Differential Equations

The John Player Cup Quarter-final
West Hartlepool v Bristol
With the other top clubs, Leicester, London Welsh and Coventry, having home games, the hardest match in the quarter-finals falls to Bristol who, for their third away game in the Cup, cannot have harder opposition than West Hartlepool in Durham, who beat the Wasps in the Third Round.
NIGEL STARNIER-SMITH commentates and brings news and views from the rest of the weekend's rugby.
Series producer HUW JONES
Boofc, The World of Rugby. 16.25 from booksellers; a BBC videobook, Ireland's Triple Crown (BBCV 5018). from retailers

Work in Progress
On the occasion of Peter Blake 's Retrospective Exhibition at the Tate Gallery, London, John Read invites you to meet the artist at a teddy bears' picnic with Loelia-World's Most Tattooed Lady Doktor K. Tortur , Tarzan, Jane, Boy and Cheta, and many more.
Film cameraman PHILIP BONHAM-CARTER Produced by JOHN READ

The Great Plains Massacre of the huge bison herds of North America.

The fourth of 15 programmes Presented by Jonathan Miller
Until recently psychologists shunned questions about the philosophy of ' mind' in the belief that they were tedious and unanswerable. Professor Daniel Dennett , from Tufts University in Boston, describes how the study of computers and artificial intelligence has helped philosophy and psychology to enjoy a more fruitful relationship.
Designer COLIN LOWREY Production
PHILIP SPEIGHT , DAVID F. TURNBULL
Book (same title), 19.95 from booksellers

The fourth of 13 programmes from Painswick House, Glos.
The British leapt into the lead last week in the most spectacular session so far of this international bridge tournament. The pressure is now on the US team. Presenter JEREMY JAMES
Commentator JEREMY FLINT bridge correspondent of The Times For the US: GAIL MOSS
JACQUI MITCHELL , NEIL SILVERMAN MATTHEW GRANOVETTER For the UK
NICOLA GARDENER, PAT DAVIES TONY PRIDAY , CLAUDE RODRIGUE
Director LINDA MCCARTHY
Producer PETER BAZALGETTE

Plus a visual commentary for those who cannot hear, with Moira Stuart
Editor FRED HOLTUM

Presented by Brian Widlake and Valerie Singleton
With LUKE CASEY, NICK CLARKE and MARK ROGERSON. Featuring: Budget 83
Sir Geoffrey Howe 's fifth budget on Tuesday has special importance. This could well be election year. The consensus is that the Chancellor could have plenty to give away in tax cuts, although volatile oil prices and the state of the pound must mean daily arithmetic for him. But his measures will also be gauged in the light of where Britain has got to since the Tories came to power in 1979. From inside the Treasury, The Money Programme team investigates the present state of our economy and forecasts what this budget will bring to us all.
Producers
WILL HUTTON, VICTOR MARMION , DON HARLEY Deputy editor ANDREW CLAYTON
Editor JOHN REYNOLDS

New Guinea Teenage Trek
Journeys into the forests of New Guinea used to be the prerogative of professional explorers. Now, almost anyone with a sense of adventure can reach places previously known to only a few.
This film is a record of one such adventure; a group of teenage Australians trek into the interior of New Guinea, meet the tribes-men and are guided by them through the mountains and the jungle.
Filmed and produced by F. J. davis and GARY STEER
Series editors ANTHONY ISAACS , PETER JONES

with Moira Stuart ; Weather

by MICHAEL WALL
The last in a series of plays From Pebble Mill
A love story set in Japan
Dan and Carol are hitching round the world. They reach Tokyo where, to pay for their journey, Carol gets some modelling and Dan teaches English. Dan's passion for the country and its culture becomes focused on one of his Pupils, a young Japanese woman. But what are her real feelings? What indeed are his?
Music composed by JOJI HIROTA Lighting BOB CHAPLIN Sound DAVID HUGHES
Designer SALLY ENGELBACH
Produced and directed by ROBIN MIDGLEY

A series of seven programmes celebrating the work and ways of the Poet Laureate, Sir John Betjeman
Presented by Jonathan Stedall

An aesthete at Oxford - Shakespeare's too difficult - school-mastering and lavatory-duty - problems with the in-laws - Victorian architects - and a visit to the GLC, with old friend Osbert Lancaster, for a meeting of the Historic Buildings Committee and a talk with Ashley Barker.
With extracts from Conversation Piece (1954), Four with Betjeman (1970), Summoned by Bells (1976), and A Pity About the Abbey (1965) - the one and only television play written by John Betjeman.

from the beautiful Ailsa Course at Turnberry Hotel, Ayrshire, scene of the 1977 Open Championship.
Golfing superstars Lee Trevino and Severiano Ballesteros , who between them have won every major championship, lead teams of celebrity partners as they challenge for the Marley Trophy.
In 1948 the star of the hit musical Oklahoma!, Howard Keel , took London's West End by storm. Nowadays he's better known for his role in Dallas, and proves a useful partner for Lee Trevino. In contrast, Cliff Thorburn made his name as recently as 1980, when he became World Snooker Champion. Also an excellent low handicap golfer, he returns to the programme to partner Seve Balles teros in a very close and entertaining match.
PETER ALLISS commentates and talks with the players in this match over nine selected holes.
Television presentation
RICHARD TILLING and ALASTAIR SCOTT Producer DAVID KENNING

Formula One World Championship The Brazilian Grand Prix
The first Grand Prix in this 17-race season gets the green light in Rio de Janeiro this afternoon.
Former World Champion NELSON piquet crossed the line first in front of his home crowd in Brazil a year ago, but current champion
KEKE ROSBERG will be bidding strongly to retain his crown. Senior British driver JOHN WATSON will want to prove he's still the best, despite the excellent testing times recorded at the track by the Toleman Team driver, DEREK WAR-WICK from Hampshire
Commentators MURRAY WALKER and JAMES HUNT
TV presentation: BRAZILIAN TV SERVICE Producer ROGER moody

starring
Tom Courtenay , Alfred Burke
Alexander Solzhenitsyn 's novel, based on his experiences in a Siberian labour camp, is a triumphant expression of man's will to survive. This film version, made on location near the Arctic Circle, vividly conveys Ivan's existence as he faces with courage, patience and humour, the struggle to survive just one more day.
Screenplay by RONALD HARWOOD from the novel by ALEXANDER SOLZHENITSYN Produced and directed by CASPER WREDE Films: page 13