(to 7.20)

9.36 MI 10: Mathematical Investigations
15: Decimals for Ever
How to cut the cake into thirds by cutting it into quarters.
followed by How Likely?
To start a game, is it fair to toss a coin? Why?
(R)

9.58 Thinkabout: Pigeon Racing
Sally and Brad visit a pigeon loft and discover how to look after and train racing pigeons. See the preparations for the big race - thousands of pigeons fill the sky. But there's only one winner!

10.15 Science Workshop: Tracks (B)

10.38 Exploring Science: Patterns of Growth

11.0 The History Trail: The Silver Buckle: 3
by Joan Aitken
Thoby's time as a servant on the plantation is coming to an end. But his mother suspects that cousin Sebastian is plotting to kill him - and that brother Richard is already dead. Certainly, Sebastian is being very secretive about a body in the forest.
(R)

11.22 Past Thirteen: Choosing for What?

Whether or not you know what you want to do when you reach school-leaving age, at options time you have to choose a school course which will be the foundation of your future. In this programme, young people show how they built the bridge between 13 or 14 and 16.

11.45 Politics and You: You and the Law
Police powers to stop and search, and the rights of animals used in experiments - through these two issues the first of this political education series examines how laws are made, and what you can do if you think a law should be changed. (R)

12.5 pm Buongiorno Italia!: 16: Rivediamo unpo'...
A course for beginners in Italian
(R)

12.30 Prima!: 6: Zweimal Bitte!
Eight short programmes about tourist German - all you need to survive.

Steve and Petra explore Hamburg: they take a boat trip and visit the infamous
Reeperbahn. Gerald learns the days of the week.
With Petra Ulich, James McKenna, Rosemary Frankau, Raymond Mason
(R)

12.45 Bellamy's New World: 5: Oklahoma OK!
Presented by David Bellamy
A series of eight films exploring America and its botanical history
(R) (Ceefax subtitles)

1.20 Appuntamento in Italia: Citta, e campagna
Una giornata a Siena; Un altro mondo; La grande citta.
(R)

1.38 Around Scotland: The Valley of the Scots: 1: The Scots of Dalriada
The Scots who settled in Argyll in the sixth century

2.0 You and Me
What can Cosmo and Dibs see in their new painting? Gary Wilmot tries to guess.
(R)

2.15 Music Time: Question and Answer

2.40 History File: Divided Ireland

with subtitles, followed by Weather

Fourth of eight programmes looking at issues which involve young people. Peace Address
Giant billboards proclaiming Peace greet the Western traveller emerging from the underground into the heart of East Berlin, capital of the German Democratic
Republic. But what lies behind the public image?
During International Youth Year Red Herrings went to
East Berlin to meet its young citizens - building workers, Pop musicians, members of the official youth organisation, and a young Christian active in the Church Peace Movement - to find out more about the realities of life for the generation who have grown up on the other side of the wall.
Film cameraman LAURIE RUSH
Film editor SIMON HOLLAND Producer CHRIS LENT
Directed by SUE DAVIDSON
The Red Herrings File contains background notes and useful contacts. Send a large sae and 28p
Postage to: [address removed]

The classic space adventure series chronicling the exploits of the captain and crew of the USS Enterprise
Starring William Shatner as Captain James T Kirk, Leonard Nimony as Mr Spock, DeForest Kelley as Dr McCoy

Created in the image of its maker - a brilliant but unstable scientist - a new computer system is given control of the Enterprise during Star Fleet war games. Kirk's pride is hurt, but much more is at stake when the machine begins taking the game seriously... (R)

Sixth of eight programmes on the mammals of Britain Presented by Tony Soper Watching and trying to understand animals is a very perplexing business. Foxes, rabbits and hares are part of our childhood, celebrated in nursery rhyme and fable, and we have a vested interest in there being a healthy population of each species.
But it's far from being a friendly and cosy world, and is very much one of predator and prey.
Film editor HUGH TASMAN
Series producer BRYN BROOKS Producer ERICA GRIFFITHS
Tony Soper 's book, 'Discovering Animals', £8.95 hardback, £4.95 paperback, from booksellers.

A series of seven programmes 5: Now You See It, Now You Don
Famine in parts of Africa is becoming endemic. Soil erosion and spreading areas of desert are reducing the amount of land available for cultivation, while at the same time the population is rising. The situation is not helped by the overgrazing of animals, or by widespread deforestation, which contributes to the frequency of the droughts. But the cutting down of forests still ravages other parts of the world.
John Seymour reports from around the world.
John Ormond narrates.
Film cameraman RUSS WALKER Film editor TIM KRUYDENBERG Producer BRIAN TURVEY BBC Wales
John Seymour's book, 'Far from
Paradise', £9.50 hardback, is available from booksellers

R. S. Thomas 's poems about the hill-farmers of mid-Wales made his reputation in the 50s. Since then, he has become involved with Welsh Nationalism and CND, while his poetry has become more directly philosophical.
To mark the publication in paperback of Thomas's Selected Poems 1946-68,
Ian Hamilton assesses the career of this unique figure in Welsh and English literature. Plus Margaret Forster on her new novel, Private Papers, and a profile of J. M. O'Neill , one-time bank official, building worker and licensee, whose first novel, Open Cut, is a powerful thriller set in London's Irish community. Directors JILL EVANS
PAUL LEE , PATCHY WHEATLEY Producer ROGER THOMPSON
Executive producer NIGEL WILLIAMS

To celebrate St Valentine's eve, an uninhibited look at the off-beat singles scene in America.
Cindy [text removed], blonde and 20, is one of 1,000 searching singles cruising on a liner off the coast of Miami. It's a raunchy romp through day and night - but will Cindy be crowned Miss Singles 85?
In New York, Jeanette [text removed], a business woman of 42, and Bob [text removed], international banker, 35, are among 30 urban professionals attending a class on 'How to Find a Lover'. They are taught to deal with rejection and project inner harmony. Will Jeanette and Bob find love at the Learning Annex? In Dallas, the latest craze is Suds, a singles launderette and bar. Will Mike [text removed], a 35-year-old recently divorced lawyer, meet the girl of his dreams as his socks spin?

Feature: page 16
(Ceefax subtitles)

The fifth game of BBC2's International Snooker
Championship for the Pot Black trophy is between three-times champion
Eddie Charlton of Australia, and the young, talented
Tony Knowles from Bolton, Lancashire, rated No 3 in the world listings.
Commentator TED LOWE Referee JOHN WILLIAMS Presenter David Icke Director PETER HAYWARD Producer JOHN G SMITH BBC Pebble Mill

John Tusa , Peter Snow Donald MacCormick and Olivia O'Leary with Jenni Murray and Ian Smith present the reports and interviews behind the main stories of the day.

Weekend Outlook helps you plan your weekend by previewing daytime programmes of special interest from the Open University on Saturday and Sunday. This week's selection includes Engineering Design: Take a Seat and World Politics: Potsdam 1
A BBC/OU Production

When you use even the most elementary mathematics to solve a problem, you are modelling. This programme explains the mathematical modelling process.
(R)
(to 0.00)