6.20 Maths Group Theory
Every letter handled by the Royal Mail has to be turned the right way round for sorting. This branch of mathematics can help design a machine to do the job.

6.45 San Francesco, Rimini II Tempio Malatestiano
Sigismondo Malatesta, tyrant of Rimini, commissioned Alberti to transform the gothic church into a new and sumptuous classical style mausoleum for himself and his family.

7.10 Putting Training to Work Britain and Germany
Comparing British and German policies for youth training among school leavers.

7.35 Care in the Community
Devon was the first British Health Authority to close all of its psychiatric hospitals. This programme looks at what took their place.

With Signing.
(Subtitled)

Children's drama about a boy caught up in espionage. Last in the series. (Rpt) (Subtitled)

Sword and sorcery animation.

A film which explodes the popular image of the koala as a cuddly creature that sits in trees eating gum leaves.

With signing and subtitles.
(Shown Sunday, 10.00am on BBC1)

Action from both 60 overs-per-side semi-final matches in the NatWest Trophy One Day series. Yorkshire play Northamptonshire at Headingley, while Glamorgan meet Warwickshire at Cardiff. With commentary by Jack Bannister, Geoffrey Boycott and David Gower.
Introduced by Richie Benaud and Tony Lewis.
(Coverage continues at 1.30pm)

The modern image of the cowboy is based on a 400-year-old tradition, that of the Mexican-American vaquero, who worked the ranches of southern Texas where the cattle industry began. This film pays tribute to the few surviving traditional cowboys and the vaqueros who came before them.

Further action, through to the finish, from today's semi-final matches. News and coverage of both matches will be shown until 1.50 pm, after which BBC1 will show one match and BBC2 will show the other match until 4.00pm. After 4.00pm, coverage of both matches will continue on BBC2. Introduced by Richie Benaud and Tony Lewis.

Including at 3.00 and 3.55 News; Regional News and Weather

The ability to predict the location and strength of earthquakes has long been the ambition of many scientists. Professor Panayotis Varatsos of Athens University feels he has finally hit upon a solution to the problem.
Presenter David Malone investigates his controversial claims.
Plus, a look at weeds, a major cause of lost productivity on farms. Plant breeders and chemists are joining forces to create new strains of crop plants that are resistant to herbicides, but the underlying fear is that the gene that makes them resistant could get into the weed plants as well.
Also on the programme is
Robert Cooke-Deegan of the US National
Academy of Sciences. He explores the implications of the commercial race to patent the human genetic blueprint.
Series producer David Paterson ; Executive producer AlexGraham Stereo Subtitled ................

For most people the National Lottery is just a harmless weekly flutter, but for some the line between interest and obsession is becoming blurred. These people are the real losers in the lottery, hooked on gambling and spending sums beyond their means in the hope that they will join the ranks of the new lottery millionaires.
Fiona Bruce reports on three families, none of them in employment, who spend more than half of their income on lottery tickets and scratch cards. While they know their chances of winning are remote, they still dream of moving from their council estates.
But winning doesn't necessarily bring happiness. Of the two winners interviewed for the programme, one is content with his new-found wealth, but the other has seen her relationship break down and has had to go to court in order to keep her winnings.
With calls growing to deregulate gambling, Public Eye travels to Spain, where deregulation occurred in the 1970s, to find out if the country's rise in the number of gambling addicts could soon be reflected in Britain.

(Subtitled)

Early in 1944, Japanese armies surrounded thousands of British and Indian soldiers along the mountainous frontier dividing India from Burma.
At the same time, other allied soldiers flew into remote jungle clearings deep behind enemy lines. All were faced with dangers such as an implacable enemy, the threat of losing one's way in the jungle, oppressive heat, poisonous insects, fevers and monsoon floods. Veterans of the Second World War describe their battle to defeat both the Japanese and the tough terrain of Burma, using the few maps available. Military historian Richard Holmes explores battle sites and follows the mule driver's route down to Mandalay as he recounts the eventual British recapture of the city.
Michael Calvert, a former commander of troops who were trying to stop the Japanese using the Burma railway, recalls how Churchill's words helped them to define their role.
(Stereo) (Subtitled)

Murder mystery based on real events, starring Mare Winningham, Peter Gallagher

Two years after the brutal murder of a sleeping couple, private detectives are assigned to the case. Their prime suspect is David West; their only hope is the offbeat and inexperienced Kim Paris. She has to adopt a false identity and get close to West to gather evidence. The danger is that she will get too close. (1990)
Film reviews pages 33-37

Followed by Video Nation Shorts

Topical news analysis, featuring interviews with leading figures and debate on the stories behind the headlines. Presented by Peter Snow.

Highlights from one of today's semi-final matches in the NatWest Trophy One Day series. The other semi-final is at 11.55pm on BBC1. Introduced by Tony Lewis.

11.55 Weatherview

Art critic Clement Greenberg discusses the work of American abstract painter Jackson Pollock.