This week, two sample programmes from next year's undergraduate calendar are shown each weekday.

12.30 Communication and Education: Open Skies, Grass Roots
British Columbia's Distance Education System uses television satellite transmission and reception to meet the needs of a widely scattered population. Known as 'The Knowledge Network', it links community colleges, universities, specialist institutes, and students.
(R)

12.55 Environmental Control and Public Health: Water Fit to Drink?
Much of Britain's drinking water comes from rivers. To maintain river quality, the Welsh Water Authority have to monitor it closely. A pollution control officer analyses samples of water by the River Dee and in a laboratory.
(R)

A See-Saw programme
by Eric Charles
(R)

The Fleeting Image
In the 1870s and 1880s
Eadweard Muybridge in the USA and Dr E.-J. Marey in France were exploring the possibilities of photographing movement.
Muybridge's 'Zoopraxiscope' and Marey's ingenious cameras were the true forerunners of the cinema. Narrated by Brian Coe Series adviser AARON SCHARF Producer ANN TURNER (R)

Weather followed by Sports Review of 1987 including at
3.00* News and Weather

Refuge
Black-winged stilts gracefully pirouette in courtship alongside colonies of wood storks, skimmers and egrets. Salton Sea, California, is a refuge.... for wildlife.
Presented by Keith Hopkins Photographed and produced by STEPHEN MILLS BBC Bristol (R)

Regional News and Weather

Desmond Lynam takes pleasure in inviting his guests to unlock the film and video vaults with their personal memories of past television moments.
Today's guest is Peter Haigh

from the Grand Hall, Olympia
At the start of the school holidays sit back and enjoy the first of five afternoon visits to this famous horse show, which offers entertainment for all the family.
Introduced by DAVID VINE Commentators
RAYMOND BROOKS-WARD STEPHEN HADLEY Producers
JOHNNIE WATHERSTON WENDY SHEPPARD

Floyd on Fish
Brittany and Cornwall have many things in common. Their cultures have been intertwined for thousands of years. Alas, the Cornish appetite for fish has not developed in the same way as the Bretons'. They, it seems, enjoy everything scooped out of the sea that divides these two ancient kingdoms.
Keith Floyd goes to St Malo to discover 'la difference'. Film editor DAVID SHARP
Producer DAVID PRITCHARD BBC South West (R)

Murder on the Rising Star
Starbuck is the prime suspect when the murdered body of his arch-rival Ortega is found after a particularly vicious game of triad. Determined to prove their friend's innocence, Boomer and Apollo find more than one member of the Galactica's crew with reasons for wanting Ortega dead.
Written by DONALD BELLISARIO JAMES CARLSON
TERRENCE MCDONNELL
Directed by ROD HOLCOMB

Books of the Year
In the last edition before
Christmas, A. N. Wilson and his guests Sue Townsend and Nigel Williams choose and review each other's favourite books of 1987. Researcher CHRIS WILSON
Production assistant SUE CHAPMAN Producer ROLAND KEATING
(Details of books available on Ceefax page 289)

'Evil - adj. The antithesis of GOOD. Now little used except in literary English.
I. Bad in a positive sense.
1. Morally depraved. Obsolete as applied to persons'
OXFORD ENGLISH DICTIONARY
This week, Michael Ignatieff and his guests
Tim Dean , Editor, Third Way magazine
Adam Kuper , anthropologist Fay Weldon , author Bernard Williams , philosopher anatomise the idea of evil: is it obsolete or absolute?
Studio director MARK HARRISON Producer AMANDA THEUNISSEN BBC Bristol

Anyone who saw
Terry Madeley during AIDS Week last March could not forget him. Terry was one of the first people with AIDS to talk openly about his disease on television. Viewers were moved by his positive attitude, his honesty and his irrepressible humour, despite the fact he faced a potentially terrifying death.
Pattie Coldwell became a personal friend and has now made this film about Terry, his family, his friends, and his fight for the right to 'die with dignity': it is the story of a man who can teach us as much about living as dying.
Written and produced by PATTIE COLDWELL. Film editor JOHN CHESWORTH. WIGGER Director SUE DURKAN
Executive producer COLIN CAMERON BBC North West
0 INFO: page 93.

requests the pleasure of your company at Party Time
This week nearly everyone is going to - or is giving - a party. Come along and enjoy the fun.
The QE2! Party:
Donald Norbrook turns his Oxfordshire house into an ocean liner. Will he avoid the storms and win the blue riband?
The Iceberg Ball:
If you're a teenager at public school, this is where it's at - but don't tell Mummy what goes on ... The Worthing Squares: Frilly petticoats, cowboy shirts, and do-si-do round John and Joyce Deadman 's lounge. The Designer Party:
Charlotte Millwood's theme is packaging. Everything's wrapped up - the food, the waitresses, even the building. Weber's 200th Birthday Party: Huddersfield Poly music student Helen Mountain isn't shy - and now's her chance to perform ... 'On Yer Bike':
It's Nanette Russell 's first party in nine years. Should she have asked the bikers? Beaux Belles:
Sad and happy memories as the old folks join in the good old songs.
Assistant producer
MARY ROSE-RICHARDS
Photography BILL BROOMFIELD
Film editor HOWARD BILLINGHAM Producer PHILIP BONHAM CARTER Editor EDWARD MIRZOEFF
* CEEFAX SUBTITLES

The Making of a Dissident Fourth of five programmes After 15 years and the most publicised release from prison in history, Natan finally met his wife in West Germany.
'A vital was waiting for me in a room, alone, and I immediately felt that we had separated only some hours ago. So I said to her in Hebrew that I'm a little bit late. And we started our journey to Israel.'
(Part 5 shown tomorrow at 10.25pm)

Presented by Peter Snow Donald MacCormick and Adam Raphael with international reports by David Sells ,
Charles Wheeler , Gavin Esler and Julian O'Halloran