6.35 Harvesting the Sun
7.00 Klein's Unification of Geometry

With Philippa Forrester. ● STEREO
Puppet fun.

Elephant animation. Babar tries to help a lonely old musician come out of seclusion.

A dream construction project for Chris becomes a nightmare when Will, Megan and Lassie are trapped in a hazardous area surrounded by activated artillery shells.
●TELETEXT SUBTITLES: page 888

Space-age cartoon. Elroy and Astro accidentally wander on to a rocket which takes off on a five-year space mission.

Parallel 9 becomes the Planet of the Japes when a plague of practical jokes erupts and the P9 inhabitants have to decide who or what is responsible!
Today's guests include Jason Donovan , Neighbours star
Kristian Schmid , and Right Said Fred performing their latest single Daydream. Plus a look at alternative circus acts with Ra Ra Zoo and the last chance to enter the Michael Jackson competition. With
Roddy Maude-Roxby , Helen Atkins , Jenny Bolt , Dominic McHale and Kevin Williams.
Executive producer Jill Roach Series producer Glyn Edwards A Roach production for BBCtv ●STEREO
0 EARTH-KNOWLEDGE: if you want to send a message to Mercator, write to P9. BBCtv, PO Box 9000. London W 1 2 8ZZ.

With Steve Rider from Barcelona.
Including at 1.00pm News
Cricket: Fourth Test
England v Pakistan
Live coverage of the third day's play in the fourth Cornhill Test from Headingley, Leeds. Last year at this ground England defeated the West Indies by 115 runs and Graham Gooch became only the fifth English Test player to carry his bat.
Pakistan won the last Test they played at Headingley, in 1987, and claimed the five-match series 1-0. Commentary by Richie Benaud , Jack Bannister ,
Ray Illingworth , Geoff Boycott , Asif Iqbal. Introduced by Tony Lewis. (Further coverage at 5.00pm on BBC2) ●STEREO
Olympic Games
The XXVth Olympic Summer Games are officially opened in Barcelona later today. A look at the personalities who could be making the headlines and taking their places in history over the next 15 days of competition. (Coverage of the Opening Ceremony tonight at 5.15pm)
Racing
From Ascot.
2.00 Wittelsbach Diamond Stakes
(Old Mile)
2.35 Princess Margaret Stakes (6f)
3.20 King George VI and Queen
Elizabeth Diamond Stakes (1 ½m). Michael Stoute hopes that his brilliant 4-year-old Saddler's
Hall can give him his first win in this race since the ill-fated
Shergar romped home in 1981. Commentary by Peter O'Sullevan , Julian Wilson and Jimmy Lindley. ●SPORT: page 14
● BARCELONA: page 24

Live coverage from Barcelona of the opening ceremony of the XXVth Olympic Games.
Four years ago in Seoul, the pulsating beats of Korean drums, mass taekwondo and haunting oriental tunes greeted the thousands of athletes marching into the stadium and entertained millions of viewers worldwide. Today, it's the turn of Catalonia's city of culture to provide the breathtaking colour and spectacle which a modern-day Olympic opening demands. This year's parade of competing nations will include the long-banned Republic of South Africa, a unified German team and, for the first time since 1936, the republics of Lithuania, Estonia and Latvia. The traditional lighting of the Olympic flame marks the start of 16 days of spectacular sport. Presented by Desmond Lynam , with David Coleman.
• STEREO
NB As the opening ceremony of the Olympic Games is live, subsequent programming may run late.

With Michael Buerk.
Weather Michael Fish
0 TELETEXT SUBTITLES (news): page 888

Cascade. While Beth throws a leaving party for her colleagues an aircraft full of tourists runs into problems over Holby City.
Episode written by Ginnie Hole Producer Geraint Morris
Director Michael Owen Morris
• STEREO; TELETEXT SUBTITLES: p 888

First showing on network television for the third and most financially successful of the violent futuristic adventures, starring Mel Gibson, Tina Turner.

Arriving in the feudal community of Bartertown, Max is taken before the flamboyant local dictator who makes him an offer he can't refuse - a fight to the death in the barbaric arena called Thunderdome.

(Teletext Subtitles: page 888)
Barry Norman: page 40

FILMFirst showing on network television for
Don Siegel 's hard-hitting police drama starring
Richard Widmark
Henry Fonda
Madigan, which begins this week's series of Midnight Movies, was one of the first of a series of adult thrillers that culminated in films like The French
Connection and Dirty Harry. When Detective Dan Madigan and his partner are outwitted by a crook wanted for murder, they are given just 72 hours to recapture their man.
● FILMS: pages 44-51