6.40 Comparative Physiology

7.5 Changing Gravity

7.30 Enzyme Purification (I)

Produced and presented by SALEEM SHAHED
Director ASHOK RAMPAL (Birmingham)

Story: Snail and Caterpillar Written by HELEN PIERS
Illustrated by PAULINE BAYNES Presenters
CAROL LEADER , FRED HARRIS

5.0 Curriculum Studies

5.25 Modern Decorative and Industrial Arts

5.50 Masters and Mistresses

6.15 Decision-Making in Britain

6.40 Perception

7.5 Romantic Recital

with Richard Kershaw News Summary
Preceded by Weather

Presented by JEREMY JAMES
The chess clock plays a very important part in the ' Master Game.' It can lead to brilliance, bafflement or blunders as players scramble to make their remaining moves. An exciting climax in tonight's semi-final for The Master Game Trophy as vital seconds count towards the end of a grudge match between
William Hartston
Former British Champion and George Botterill
Current British Champion
Analysis by LEONARD BARDEN
Director JOHN WILCOX
Producer ROBERT TONER

A personal view by J. Bronowski in 13 programmes
9: The Ladder of Creation
Where was the Garden of Eden? How did life begin on earth? World-shattering questions that sparked off the greatest controversy of the Victorian Age. DR BRONOWSKI recounts the tropical adventures of that most entertaining and accident-prone of self-made naturalists, Alfred Russell Wallace, and how they triggered off the idea of the more famous Charles Darwin.
The film is everywhere superb. So. in his idiosyncratic way, is Dr Bronowski.
(NATURE)
Producer DICK GILLING
Series editor ADRIAN MALONE
Book (same title). £5.50, from bookshops

The Story of the Red Orchestra in three parts
3 : The Network Breaks Up
With the Belgian network in ruins and the Berlin group broken, Trepper's French circuit becomes of utmost importance to Moscow. The ' Simex ' office in Paris bustles with activity. Trading exclusively with the Germans it supplies everything from the black market. But en route to Paris are two German officers bent on breaking up the spy ring once and for all. The days of the Red Orchestra and its Grand Chef are numbered.
Scenario by PETER ADLER , HANS GOTTSCHALK and FRANZ PETER WIRTH based on the book Codeword: Direktor by HEINZ HOHNES Director FRANZ PETER WIRTH
A production of BAVARIA ATELIER GMBH

'Convention time is not a time for logic; it is a form of musical madness, with no one getting much sleep. Barbershoppers go on a harmony binge; they soak it up as though it were going out of style, rushing around lobbies to hear this quartet or that, stopping on sidewalks and street corners to listen to swipe or tag; they are like demented bees, charging from flower to flower, simply overcome by it all, and a bit afraid that there won't be any more.'
Just about a year ago in Kansas City's midsummer heat 7,000 four-part harmony fanatics put on their fancy clothes and raised the temperature even higher with their non-stop melodies.
This is a look at the hosts in general and four men in particular. Narrator HUMPHREY LYTTELTON
Written and directed by PHILIP LEWIS

Presented by Angela Rippon Weather

HUGH BURDEN reads The Caves by ELIZABETH JENNINGS