7.40 Environment

8.5 Banking

8.30 Chemical Reactions: 1

8.55 Industrial Social Systems

9.20 Maths: Complex Series

9.45 Internal Energy

10.10 Open Forum: ou Politics

10.35 Positive Discrimination in Education

11.0 Instrumentation: Numerical Control

11.25 Solving Equations

11.50 Pneumatic Circuits

12.15 Eysenck's Demon

12.40 Geophysical Techniques

1.5 Chicago's Land Use

1.30 Elementary Maths

featuring Somerset v Sussex

Few counties have a better crop of young players than Somerset. Sussex's concentration on a youth policy has still to pay dividends. But Tony Greig firmly believes that the new imports Roger Knight and Arnold Long will give the necessary leavening of experience.

Peter Walker introduces the programme which includes news of today's other fixtures:
Essex v Warwickshire
Glamorgan v Gloucestershire
Hampshire v Derbyshire
Lancashire v Surrey
Middlesex v Kent

Commentators at Taunton John Arlott and Jim Laker

Wales
Cricket: Glamorgan v Gloucestershire and Seven-a-side Rugby Union: The Snelling Tournament

A digest of the news of the week with Kenneth Kendall.

The story of the Rio Balsas Power Boat Marathon

The State of Guerrero is one of the most arid and beautiful in Mexico. Once a year the canyons and the river are shattered by the roar of power boats. Visiting international crews send their 600hp jet boats snarling down the rapids at 70 mph. Some leap over the rocks; some slam into them and sink - £4,000-worth of boat lost in a few seconds. The 370-mile race lasts five days and passes through rapids and canyons, lakes and the open sea. Each night the Army build a barbed wire camp on the beach - bandits without, scorpions within - but the Mexican stars are overhead and the excitement of Mexico all around. For the Rio Balsas is much more than just a river race - it is a journey through Mexico.

Starring Alan Alda as Hawkeye and Wayne Rogers as Trapper John

Hawkeye only wants a pint of Frank's blood. Not much to ask and it's all in a good cause. But it is a fairly safe bet that stingy Frank will refuse even such a paltry donation so Hawkeye helps himself - and gets the shock of his life.

Weather

Observations, exploration and sometimes illumination of what's going on, what's being said and what might be happening. With Alasdair Clayre, Nemone Lethbridge, Ned Sherrin

BBC Manchester

(On Sunday 16 May, at 8.45 pm on BBC2, Malcolm Muggeridge starts his new series Stop to Think, when he and his guests will be attempting each week to answer perplexing questions, great and small, arising out of the human condition and submitted by the viewers. If you have questions for the first programme, when the panel will include John Mortimer, QC, and Professor Liam Hudson, an expert in IQ tests, please send them on a postcard without delay to: Stop to Think, [address removed].)

This week the Royal Festival Hall celebrates its Silver Jubilee. To mark the occasion Richard Baker dips into BBC Television's Archives to tell the Hall's history and introduce excerpts from 11 memorable concerts which have taken place there.

Among the soloists are Maria Callas, David Oistrakh and Vladimir Ashkenazy, and the conductors include Sir Malcolm Sargent, Igor Stravinsky, Rudolf Kempe, Carlo Maria Giulini and Colin Davis.

The programme ends with the Finale of Beethoven's Choral Symphony conducted by Otto Klemperer with Teresa Zylis-Gara, Janet Baker, George Shirley, Theo Adam and the New Philharmonia Chorus and Orchestra.

Starring Del Walker, Anne Gooding, Sam Shepherd

Del Quant is dissatisfied with his apprenticeship and his lifestyle. His sense of frustration increases when his courtship of 15-year-old Irene is opposed by both his father and her mother. Del joins his friend Jo, nicknamed Bronco Bullfrog, in robbing a railway truck and although he is not attracted by a life of crime, it seems that Jo is the only person who understands him.

Films: page 9