9.5 Modern Art: Cézanne.6.30 Sexual Identity. 6.55 Biology: The Rod Cell.
7.20 Light: In Search bf a Mode) 7.45 The Madonna di San Biagio,

The Embassy
World Professional Championship
Championship from Sheffield Fourth Day
Featuring TERRY GRIFFITHS , who won in 1979, and CLIFF THORBURN , first overseas champion in 1980. Introduced by DAVID VINE

Atarah Ben Tovim, former principal flautist with the Royal Liverpool Philharmonic Orchestra, now runs the Ben Tovim Children's Music Centre in Rossendale, Lancashire, and is a leading campaigner for children's right to music.

A BBC/Open University production
(Rpt)

Gary Moore , R.E.O. Speedwagon
Recorded at the Westfalenhalle in Dortmund by German Television.
Television presentation MICHAEL APPLETON

Frame of the Day

with subtitles, followed by Weather

Starring Michael Rennie, Patricia Neal

The season ends with one of the great classics of 50s SF. Out of space comes the world's most civilised alien to warn mankind of the perils of war. But can the visitor overcome the suspicions of the world's leaders? Can the vital words 'Klaatu... barada... nikto' reach the invincible robot Gort in time to save the world?

The last in the present series
Introduced by William Woollard from the BL Technology Gaydon Proving Ground. Top Gear looks at the latest research and development work, including the ECV-3 Energy Conservation Vehicle.
Sue Baker reports on two new ideas for handicapped drivers.
Frank Page gives his impressions of the latest Ford, the XR4.
Chris Goffey finds out more about the new breathalyser regulations at a Warwickshire police station.
Director BRIAN STRACHAN
Executive producer DEREK SMITH
BBC Pebble Mill

Eight films about the pleasures of birdwatching; presented by Tony Soper 3: A Home of Your Own
Set up a nest box in your garden and you can observe the family life of birds at first hand; from the first territory fights to a row of fledgelings on a branch. Film editor AL CELL
Producer RON BLOOMFIELD Book (same title), £3.50 from booksellers

with John Pitman
The last of six films which go behind the scenes of places which are part of the British way of life.
Walton-on-the-Naze in Essex is a traditional little seaside town. It's got a sandy beach and a pier and not much else. But despite the age of the jet and the cheap package tour, Walton's population still doubles during the season.
This film reflects a typical day at the sea with the people who have been coming here for years and the people whose job it is, to entertain them and keep them happy.
It begins early in the morning when Eileen Fowler, the 'First Lady of Keep Fit' can be found on the beach, still practising what she started preaching back in the 50s. She-first visited there as a child in 1921 and returned to retire.
We meet the Punch and Judy man, the family who run a Wild West show at the back of the car park and Brian and Charlie, resident entertainers, who love doing the season "because we get just as much enjoyment here as we would at the Palladium or Las Vegas".

The Embassy
World Professional Championship from The Crucible Theatre. Sheffield.
STEVE DAVIS completes his best-of-19 frames first-round match tonight-and the favourite and 1981 Champion will be hoping to go one better than last year when he was defeated by Tony Knowles. PERRIE MANS , the runner-up in 1976, makes a welcome return to Sheffield as he starts his match.
DAVID viNE introduces highlights of this evening's- session. Commentators TED LOWE
JACK KARNEHM and clive EVERTON

DAVID VINE introduces further coverage from Sheffield.

12.10 Reading Development Pupils from Hastingsbury School. Bed-. ford, have decided to produce an ' inhabitants' guide ' for their district. How do they approach the task?
12.35 Calculus: Functions and Graphs Just, how are mathematical functions and their appropriate graphs related? The programme explores some properties of the hyperbola.
1.0 Noise and Interference How can you improve your radio and TV reception? Why a low-noise aerial pre-amplifier can lead to a better quality-TV picture, and why an FM radio tuner gives superior performance