9.38 Science All Around: Time
FERGUS O'KELLY and ANN HEYNO find out how to tell the time using the sun, water, sand or candles, with the help of JOHN CLIVE , TONY HUGHES , CHARLES COLLINGWOOD , JULIA WATSON Producer PETER BRATT
10.0 Merry-go-Rouiid
The Water Way
10.23 It's Maths
3: Multiplication

A series for 4- and 5-year-olds, and adults watching with them.
Introduced by David Ashton. (Repeat)

11.0 Engineering Craft Studies: Friction

11.22 Music Time: Twos and Threes: 1
Slapping knees and clapping help to tell the difference between a march and a waltz.
Producer ELIZABETH BENNETT

11.45 General Studies: Metalwork and Megaliths
(Repeat)

Weather BILL GILES

Donny MacLeod , David Seymour and Marian Foster
The live and lively magazine, presenting the personalities and talking points of the day and including John Gale , the Pebble Mill potter.

2.1 Words and Pictures
A series to encourage reading. Pigs and Pumpkins
2.18 Location Britain
Location 3: Lynmouth
2.40 Going to Work
The First Week at Work
School leavers in their first jobs, on their first day, in their first week. What do they think of it so far?
Producer ROGER BRUNSKILL Series editor PAUL MITCHELL

(Shown yesterday)

Story: "The Man Who Was Going to Mind the House" by David McKee

Presenters Sarah Long, Derek Griffiths

Planet of Fear
Written and told by Patrick Moore ' Scott Saunders knew they were accelerating. Ahead, the asteroid seemed to leap towards them, swelling until it filled the whole sky. The motor spluttered then stopped. " We're going to crash! " roared Vale.'
Today: Minor Planet No 6547 Preview: page 29

with Lesley Judd, Simon Groom and Christopher Wenner

The 20th Birthday Celebrations: Join in with guests Leila Williams, Christopher Trace, Valerie Singleton, John Noakes and Peter Purves.

Watch out for the nationwide Birthday Balloon Launch from Aberdeen, Cardiff, Belfast, Manchester and the roof of Television Centre in London. If a balloon lands near you, put the label in the post and win a special Birthday Badge.

Blue Peter Fifteenth Book, £1.35, from bookshops

with Angela Rippon; Weatherman

Presented live from London and the BBC studios around Britain. Frank Bough, Sue Lawley
John Stapleton and Bob Wellings are the team that bring you Britain's most watched current affairs programme. Each weekday evening they present analysis of topical events plus the features and film that make up the scene Nationwide. including tonight
Pigeonhole with Richard Stilgoe
Producers DAVID DICKINSON ANDREW TAUSSIG , KEN VASS Deputy editor DAVID LLOYD Editor HUGH WILLIAMS

The fifth in a series of 13 episodes starring
Diane Cilento , Norman Rodway Jean Kent , Edward Hardwicke with Christopher Gable , Denise Buckley Deborah Fallender and Hugh Ross , Sue Nicholls in Anything but the Truth by JOHN KERSHAW
Why did late tycoon Sir Sydney Clark spend three weeks in hospital in 1971? Was it to avoid answering questions at a public inquiry into his business activities? Or is the reason far more complex?
Series created by JOHN SICHEL Studio lighting BARRY bill
Studio sound GEOFFREY HEWITT Designer IAN RAWNSLEY
Director DAVID SULLIVAN PROUDFOOT ProducerJOHN sichel BBC Birmingham

The Friends who Put Fire tn the Heavens
This is the name given by African workers to a group of German rocket scientists who plan to launch spy satellites from a base in Zaire. Panorama reports on how OTRAG, a company headed by one of Hitler's chief rocket engineers, is building the Western world's largest rocket test range. Reporter Philip Tibenham
Producer CHRISTOPHER OLGIATI
Deputy editor ELWYN PARRY JONES Editor CHRISTOPHER CAPBON

with Angela Rippon — and the BBC's reporters and correspondents around the world Weather

explains the news and examines the issues from Britain and around the world that are still going to matter tomorrow.
Presented by Denis Tuohy Valerie Singleton and Donald MacCormlck
Including News Headlinei
Editor ROGER BOLTON