Story: Harry's Walk
Written by URSULA DANIELS Presenters
Elizabeth Millbank, Fred Harris
Books, Storytlme from Play School, 80p, and More Stories from Play School, 65p; Play School, Hello (record REC 425. cassette ZCM 425), Play On (record REC, 332, cassette ZCM 332). Bang on a Drum, songs from Play School and Play Awa) (record REC 242, cassette MRMC 004). from retailers

A series of 12 programmes aimed at giving direct help to those having difficulty with O-level Maths.
2: Percentages
Presented by NORMAN GOWAR (Open University)
Director PATRICK TITLEY Producer ROBERT CLAMP

Ten programmes which aim to help mentally - handicapped people to get more out of life.
Presented by BRIAN RIX and JANE COLLINS
2: Let's Go and Wear the Right Clothes
Assistant producer ROSANNA HIBBERT Producer CHARLES PASCOE

An eight-part examination of the history and current state of the British economy.
Written and presented by JOHN EATWELL
2: Voices in the Air
Directed by ROBERT ALBURY
Produced by TONY ROBERTS
Book (same title) f4.95 paperback, 19.95 hardback, from booksellers

A series of four programmes With HAROLD EVANS
2: All the News that Fits ...
How is the daily torrent of news channelled into pages of a newspaper?
Producer BERNARD ADAMS
Director MARION ALLINSON

Ten programmes exploring the world of information science with CHRIS SERLE, IAN MCNAUGHT-DAVIS and GILL NEVILL.
2: Just One Thing After Another
Directors FRANK ASH, MATT BONEY
Telesoftware on Ceefax page 705 (BBC1

Ten case studies for discussion by teachers
2: A Primary Response
Should teachers seek to draw out from pupils any family history of migration, both to get to know the children as individuals and to share in class the different cultural background they bring into school? Is it important to discuss the children's experience and perceptions of racism in the community?
Director TOM ROBERTS
Producer JOHN TWITCHIN
For discussion leader's notes, send large sae to Multi-Cultural Education, BBCtv, [address removed]
Handbook: Multi-Cultural Education - Views from the Classroom, £3.75 from booksellers or from BBC Publications, [address removed]inc £1.15 for postage

The Flower Lovers
An award winning cartoon from Yugoslavia.
A horticulturalist invents a fertiliser which causes flowers to explode at the moment of maturity. When the blooms become status symbols the situation gets very explosive indeed.
Directed by BORIVOJ DOVNIKOVIC

A Personal Voyage
Backbone of the Night
When the young Carl Sagan handed in his first library ticket for a book on ' The Stars' he was given a movie magazine.
Anyone who would have shared his dismay will be absorbed by this week's trip through our preconceptions and projections about the heavenly firmament - from early man to Ancient Greece to modem-day Brooklyn.
Presented by CARL SAGAN
Executive producer ADRIAN MALONE
A Joint production of KCET and CARL SAGAN PRODUCTIONS INC in association with BBCtv

6: Tandoori Prawns
Indian snacks are some of the most delicious in the world. madHUR JAFFREY shows you how to make samosas-those delicious little stuffed savoury patties, as well as tandoori prawns and poppadums.
Assistant producer JENNY STEVENS Producer JENNY ROGERS
Indian recipe on Ceefax page 167 every Monday
0 HELP! page 87

with subtitles, followed by Weather

starring
Ronnie Barker and Ronnie Corbett and their guest Clodagh Rodgers, featuring Band of Slaves With PATRICIA BRAKE
ELIZABETH LARNER , JENNY LOGAN LIZ WHITING , JIMMY MAC
Also appearing PAUL LUTY
Script associate IAN DAVIDSON
Written by KIT GALER , DAVID RENWICK PETER VINCENT and BARRIE CRYER HODGES AND PEACOCK, GERALD WILEY Musical director PETER BREWIS
Executive producer MICHAEL HURLL Producer PAUL JACKSON

News, sketches and monologues from Messrs Barker and Corbett, including Fete Worse than Death and Pills and Ills. Plus music from Clodagh Rodgers.

A six-part serial by John le Carré screenplay by JOHN LE CARRE and JOHN HOPKINS also starring, in order of appearance Barry Foster , Bill Paterson
Michael Byrne , Bernard Hepton Anthony Bate , Sián Phillips Rosalie Crutchley and featuring Michael Lonsdale
5: ' If a rogue elephant charges at me out of the thickets of my past and gives me a second shot at it, I intend to shoot it dead, but with the minimum of force.'
Leipzig was dead but Kretzschmar had the tapes - Kirov's confession and the fruits of Leipzig's blackmail. Armed with this evidence Smiley has called for a crash meeting with Saul Enderby , currently head of the Circus.
Music composed and conducted by PATRICK GOWERS
Film editor CLARE DOUGLAS Designer AUSTEN SPRIGGS
Photography KENNETH MACMILLAN Producer JONATHAN POWELL Director SIMON LANGTON
* Subtitles on Ceefax page 270

starring Spike Milligan
John Bluthal , Keith Smith
With DAVID ADAMS , SUZANNE SINCLAIR DAVID LODGE, JULIA BRECK
ALAN CLARE , MIKE O'MALLEY LINZI DREW, SUSAN JACK and special guest appearances of Alan Minter , Peter Woods
Spike Milligan , recently voted light entertainment's Smiley, in an excerpt from his one-man show. Written by SPIKE MILLIGAN , NEIL SHAND ANDREW MARSHALL , DAVID RENWICK Sound MICHAEL MCCARTHY
Lighting BERT POSTLETHWAITE. Designers ANDREE WELSTEAD HORNBY , CHRIS HULL
Produced and directed by ALAN j. w. BELL

Astronauts saw them on the way to the moon. Television screens across the world carried dramatic pictures of them on New Year's Eve 1978. Unidentified flying objects - UFOs - undoubtedly exist. The question is: what are they?

In most cases those who see UFOs are not mad or drunk, but responsible adults who are sincerely convinced that they have witnessed something very strange. And the sightings are not just visual - UFOs have been photographed, filmed and tracked on radar.

So are these sightings evidence of spacecraft from other worlds-or of something more down to earth? Tonight's programme examines some of the more classic UFO cases and comes up with at least one rather startling possibility.

Paul Theroux 's London
American by birth. a traveller by instinct, he has lived in south
London for 11 years. Julian Jebb talks to Paul Theroux , the author of The Great Railway Bazaar about his triple life, about his intimate and mysterious visions of Clapham, Battersea and Catford, settings for The Family Arsenal and a new book of short stories The London Embassy.
Photography
JOHN HOOPER , COLIN WALDECK Film editor PADDY WILSON Executive producer TOM GUTTERIDGE
Director JULIAN JEBB *
(The Booker Prize: tomorrow at 8.15 pm)