6.25 Images: The Surface of Mars
6.50 Nuclear Waste: A Scientific Inquiry?
7.15 Exmoor: A Self-Portrait
7.40 Earthquakes and Technology
8.5 Floating on Oiliig
8.3O Falling Leaves and Beating Hearts
8.55 Inner City Story (1)
1.10 Maths: Modelling. Stocks 9. 45 Open Forum
10.10 Work. Energy, and Power
10.35 Oil: From Small Beginnings
11.0 Oceanography: Carbonates
11.25 James Bond (4)
11.50 Biology: Feeding Mechanisms
12.15 Geology: Glaciers
12.40 Vlsual illusions: Now You See It
1.5 Systems Organisation
1.30 Maths: Partial Differentiation

Introduced by Desmond Lynam
2.15*
Motorcycling from Silverstone
The Marlboro British 250cc and 500cc Grand Prix
In the 500cc championship, FREDDIE SPENCER 'S lead has been gradually whittled away by fellow American KENNY ROBERTS , winner at Silverstone in 1978 and 1979. Britain's BARRY SHEENE will be hoping for better fortune after his horrific crash before last year's race. Commentators MURRAY WALKER and JOHN SURTEES
2.55*
International Athletics from Gateshead
The Rank Xerox Games
With just one week to go before the World Championships, some of the sport's top names complete their preparation.
STEVE OVETT and STEVE CRAM are among the medal contenders today. Commentators
DAVID COLEMAN , RON PICKERINC
STUART STOREY and BRENDAN FOSTER
4.55*
The European Show
Jumping Championships from Hickstead
The Silk Cut Prize
The final phase of this year's European Championships, won last year by PAUL schockemohle. The penalties incurred by each rider on the first two days are added to those in this afternoon's two rounds to decide the final placings. Commentators
RAYMOND BROOKS-WARD STEPHEN HADLEY
Plus the latest sports news, including
John Player League scores.
* The above timings indicate only the first o/ several transmissions. Television, presentaUon: Motorcycling JOHN PHILIPS Athletics JOHN SHREWSBURY
Show Jumping JOHNNIE WATHERSTON Studio producer ROGER MOODY
Assistant editor JOHN ROWLINSON Producer wahtin HOPKINS Editor MIKE MURPHY

plus a visual commentary for those who cannot hear. with Jan Leeming
Editor FRED HOLTUM

A series of seven programmes which examine the impact of air travel on ourselves and the world we live 1n.
Presented by Julian Pettlfer 2: Running an Airline
United Airlines is the largest airline in the non-Communist world. In 1978, like most airlines in the USA, United enjoyed a year which has become a landmark in aviation history. A tempting array of cut-price fares with names like 'Supersaver ', ' Chickenfeed ' and ' Peanuts ' seduced a nation of air travellers into the skies as never before. For the airlines the cash registers rang; for the passengers there were unprecedented delays, frustrations and over-all chaos.
Film editor DAVID LEE
Produced by JOHN PURDIE

with Jan Leeming ; Weather

P. D. James
On the Dangerous Edge
' The essential stimulus to a writer's creative imagination can come in a number of ways: perhaps the underlying theme of the novel, or one particular character. or, for a detective novelist, a new and ingenious method of murder. But, for me, it is usually none of these. For me it all starts with a place.'
P. D. JAMES has inherited the title 'Queen of Crime' from Dorothy L. Sayers and Agatha Christie. In such books as The Black Tower, Death of an Expert Witness, Innocent Blood and The Skull Beneath the Skin, she has extended the boundaries of detective fiction to include places and situations which are very far from the country house parties and sinister villages of the classic 1 whodunit
Film cameraman HENRY FARRAR Film editor Richard SEEL Producer ADAM LOW

A Newsnight special
John Tusa introduces the four candidates for the leadership of the Labour Party, sharing a platform for the first time to debate the future of the Labour movement. Roy Hattersley , Eric Heffer. Nell Kinnock and Peter Shore each present their views on solving the difficult problems facing the Party, and answer questions from Party members.
Producer philip Campbell Director MIKE CATHERWOOD Editor PAUL NORRIS

from Silverstone
The 1983 Marlboro British Motorcycle Grand Prix
The 1983 500cc Motorcycle Road Racing Championship has been a thrilling battle between two brilliant American riders; three-times World Champion Kenny Roberts and 20-year-old newcomer Freddie Spencer. Spencer, with five victories from nine races, leads four-times winner Roberts by only five points and the British Grand Prix at Silverstone could well decide the Championship. Commentators
MURRAY WALKER , JOHN SURTEES
Producer JOHN philips

from Hickstead featuring
The Silk Cut Prize (Part III)
Highlights of today's final phase to decide the individual gold, silver and bronze medals. Introduced by DAVID VINE
Commentators
RAYMOND BROOKS WARD and STEPHEN HADLEY
Producer JOHNNIE WATHEBSTON

with Warren Beatty continues the season of films starring Elizabeth Taylor
Fran Walker , a Las Vegas chorus girl, hopes for only one thing - a happy marriage. Unfortunately, she meets and falls in love with a handsome piano player who upsets her plans. For Joe is a compulsive gambler and never knows when to stop ...
Screenplay by FRANK D. GILROY Produced by FRED KOHLNIAR
Directed by GEORGE STEVENS. Films: p 12