9.38-9.58 Science Session: Life in the balance
With David Bellamy
Narrator Alex Glasgow
Producer MIKE HARRISON
(Bellamy's Britain: Thursday, 11.27pm)

10.25-10.45 Science All Around: Looking at Animals

11.0 Watch!: Looking for Holes
A trip down a cave in the Mendips. Presented by Jean Rogers and Stephen Bradley
Producer MOYRA GAMBLETON
(Colour)

11.18 Going to Work: Responsibility? Are we accountable to others?
by Bill Lyons
With David Janson, Liz Edmiston, Leonard Brockwell, Deirdre Costello, Peter Pacey, John Quarmby and Eric Lindsay
Producer BARBARA Parker
(Colour)

11.40 Quatre Coins de la France: La Vie a la Mer
Scriptwriter JENNIFER SCAMP
Commentaries by JEAN SERRET, GILLES DATTAS, ANDRE MARANNE
Producer PEGGIE BROADHEAD
(Colour)

With BOB LANGLEY, MARIAN FOSTER DAVID SEYMOUR and DONNY MACLEOD and a chat with today's Weatherman KEITH BEST at 1.30

2.2 Music Time: 21

Jonathan Miller visits Down House in Kent where Darwin ' ... after absorbing and transforming his experience of travel like a python that's eaten an enormous meal' wrote the Origin of Species; and gives a personal view of the work and its author.
Film cameraman NAT CROSBY JULIAN JEBB

The inside stories about police work-and the views of the public. Introduced by DAVID SEYMOUR with MIKE DORNAN
PHILIP FRANKLIN
Editor BRIAN GIBSON (Birmingham)

starring with Charley's Back in Town
The Governor faces an embarrassing conflict of interests when his brother-in-law Charley becomes involved with a company which does business with the state.

Slip and Slap Building a House

with Michael Gough The Golden Touch by LYNNE REID BANKS
Part 2: The Ash-Birds Know

Introduced by Johnny Morris A Magazine of Animals with the results of the Australian Wildlife Competition and news of an exhibition of some of the paintings submitted by the younger entrants. s ROBIN helmer , GEORGE inger
Producer DOUGLAS THOMAS (from Bristol)

with Kenneth Kendall ; Weather

bringing you news and views in your region tonight
(including Regional Weather) Presented by MICHAEL BARRATT FRANK BOUGH , BOB WELUNGS and SUE LAWLEY

With Love, Bullets and Valentines starring
Trampas encounters the incredible Valentine gang and hardly knows whether to laugh or gape at their audacity and guile,

presents
Franklyn and Johnnie by RICHARD WARING starring Ronnie Barker with Geoffrey Baylden and Richard Hurndall
Joyce Heron , Sydney Bromley
Franklyn and Johnnie have been enemies for 40 years. Could it be that the death of their one mutual friend might heal the breach?
Comedy Playhouse signature music by RON GRAINER
Incidental music by DENNIS WILSON Designer CHRISTINE riiscoe Producer grasme MUIR

with Kenneth Kendall and Peter Woods Weather

An Investigation into Secrecy Tuesday's Documentary
Workers have taken jobs in a London factory without first being told they could be working with a killer substance. Over 100 died in 12 years-the youngest was 32. In law they had no right to know potential risks.
Yorkshire's rivers are the worst in the country but the identity of the polluters has been kept secret. ' The law protects the polluter not the public' claims the Yorkshire River Authority. Some local authorities say undue secrecy at the Department of the Environment hinders their efforts to improve the environment.
As a recent Royal Commission demands a more open policy this film investigates specific cases of secrecy and asks should there be a ' right to know '?
Written by Jeremy HORNSBY Producer MICHAEL BARNES

Introduced by Ludovic Kennedy together with NICHOLAS HARMAN
Tom Mangold , Vincent Hanna , Michael Cockerell , Bill Kerr Elliott and David Jessel are the Midweek correspondents.
Deputy editor JOHN GAU
Editor PETER FAGNAMENTA

What's On/Regional News

A Triangular Look at the Bible
Tonight Marion Giordan chooses a passage from the Epistles to discuss with William Neil and Moelwyn Merchant
Producer R. T. BROOKS